Mathaversaries

26th March, 1941

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What is this?

The practice of celebrating the number of orbits a person has lived or a marriage has lasted been tradition for as long as we have measured the passing of years.

But why do we attach so much importance to that particular astronomical curiosity? Why put special emphasis on multiples of ten of these particular planetary pirouettes? Why not celebrate 1,000 days of marriage? Or 150 Mercury years alive? Or 5 Cobalt 60 half-lives?

Mathaversaries can help you remember these uncommon milestones, and ensure you never miss an excuse to celebrate.

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DateDaysEvent
24 June 2013 26,388 300 Mercury years
25 June 2013 26,389 38,000,000 minutes
27 June 2013 26,391 23 Pi years
26 March 2014 26,663 73 Earth years
3 August 2014 26,793 39 Mars years
14 August 2014 26,804 27 e years
7 January 2015 26,950 14 Cobalt 60 half-lives
21 January 2015 26,964 120 Venus years
26 February 2015 27,000 27,000 days
10 March 2015 27,012 6 Hydrogen 3 (Tritium) half-lives
26 March 2015 27,028 74 Earth years
20 May 2015 27,083 39,000,000 minutes
21 November 2015 27,268 310 Mercury years
23 December 2015 27,300 1,000 lunar orbits
26 March 2016 27,394 75 Earth years
20 June 2016 27,480 40 Mars years
17 August 2016 27,538 24 Pi years
10 October 2016 27,592 2 reigns of Henry VIII
25 February 2017 27,730 80 Draconic years
26 March 2017 27,759 76 Earth years
14 April 2017 27,778 40,000,000 minutes
3 May 2017 27,797 28 e years
22 November 2017 28,000 28,000 days
26 March 2018 28,124 77 Earth years
18 April 2018 28,147 320 Mercury years
8 May 2018 28,167 41 Mars years
9 March 2019 28,472 41,000,000 minutes
26 March 2019 28,489 78 Earth years
10 September 2019 28,657 23rd Fibonacci number days
3 October 2019 28,680 6 Californium 250 half-lives
9 October 2019 28,686 25 Pi years
21 January 2020 28,790 29 e years
25 February 2020 28,825 70 Full moon cycles
25 March 2020 28,854 42 Mars years
26 March 2020 28,855 79 Earth years
15 April 2020 28,875 15 Cobalt 60 half-lives
18 August 2020 29,000 29,000 days
14 September 2020 29,027 330 Mercury years
31 January 2021 29,166 42,000,000 minutes
1 February 2021 29,167 700,000 hours
17 March 2021 29,211 130 Venus years
26 March 2021 29,220 80 Earth years
10 February 2022 29,541 43 Mars years
26 March 2022 29,585 81 Earth years
9 October 2022 29,782 30 e years
29 November 2022 29,833 26 Pi years
27 December 2022 29,861 43,000,000 minutes
10 February 2023 29,906 340 Mercury years
26 March 2023 29,950 82 Earth years
15 May 2023 30,000 30,000 days
14 June 2023 30,030 1,100 lunar orbits
29 December 2023 30,228 44 Mars years
17 January 2024 30,247 4321 weeks
26 March 2024 30,316 83 Earth years
8 April 2024 30,329 7 Jupiter years
20 November 2024 30,555 44,000,000 minutes
26 March 2025 30,681 84 Earth years
28 June 2025 30,775 31 e years
9 July 2025 30,786 350 Mercury years
23 July 2025 30,800 16 Cobalt 60 half-lives
15 November 2025 30,915 45 Mars years
20 January 2026 30,981 27 Pi years
8 February 2026 31,000 31,000 days
26 March 2026 31,046 85 Earth years
23 August 2026 31,196 90 Draconic years
16 October 2026 31,250 45,000,000 minutes
26 March 2027 31,411 86 Earth years
12 May 2027 31,458 140 Venus years
7 July 2027 31,514 7 Hydrogen 3 (Tritium) half-lives
3 October 2027 31,602 46 Mars years
6 December 2027 31,666 360 Mercury years
17 March 2028 31,768 32 e years
26 March 2028 31,777 87 Earth years
31 August 2028 31,935 5,000 Pluto days
9 September 2028 31,944 46,000,000 minutes
9 September 2028 31,944 3 Curium 243 half-lives
4 November 2028 32,000 32,000 days
12 March 2029 32,128 28 Pi years
26 March 2029 32,142 88 Earth years
20 August 2029 32,289 47 Mars years
15 March 2030 32,496 3 Saturn years
26 March 2030 32,507 89 Earth years
3 May 2030 32,545 370 Mercury years
5 August 2030 32,639 47,000,000 minutes
30 October 2030 32,725 17 Cobalt 60 half-lives
4 December 2030 32,760 1,200 lunar orbits
5 December 2030 32,761 33 e years
26 March 2031 32,872 90 Earth years
4 June 2031 32,942 80 Full moon cycles
8 July 2031 32,976 48 Mars years
1 August 2031 33,000 33,000 days
26 March 2032 33,238 91 Earth years
3 May 2032 33,276 29 Pi years
29 June 2032 33,333 33333 days
29 June 2032 33,333 48,000,000 minutes
29 June 2032 33,333 800,000 hours
29 September 2032 33,425 380 Mercury years
3 November 2032 33,460 7 Californium 250 half-lives
26 March 2033 33,603 92 Earth years
25 May 2033 33,663 49 Mars years
6 July 2033 33,705 150 Venus years
23 August 2033 33,753 34 e years
26 March 2034 33,968 93 Earth years
27 April 2034 34,000 34,000 days
25 May 2034 34,028 49,000,000 minutes
25 February 2035 34,304 390 Mercury years
26 March 2035 34,333 94 Earth years
12 April 2035 34,350 50 Mars years
24 June 2035 34,423 30 Pi years
6 February 2036 34,650 18 Cobalt 60 half-lives
18 February 2036 34,662 100 Draconic years
18 February 2036 34,662 8 Jupiter years
26 March 2036 34,699 95 Earth years
18 April 2036 34,722 3 gigaseconds
18 April 2036 34,722 50,000,000 minutes
12 May 2036 34,746 35 e years
21 January 2037 35,000 35,000 days
27 February 2037 35,037 51 Mars years
26 March 2037 35,064 96 Earth years
24 July 2037 35,184 400 Mercury years
13 March 2038 35,416 51,000,000 minutes
26 March 2038 35,429 97 Earth years
26 May 2038 35,490 1,300 lunar orbits
14 August 2038 35,570 31 Pi years
15 January 2039 35,724 52 Mars years
30 January 2039 35,739 36 e years
26 March 2039 35,794 98 Earth years
31 August 2039 35,952 160 Venus years
18 October 2039 36,000 36,000 days
3 November 2039 36,016 8 Hydrogen 3 (Tritium) half-lives
21 December 2039 36,064 410 Mercury years
6 February 2040 36,111 52,000,000 minutes
26 March 2040 36,160 99 Earth years
2 December 2040 36,411 53 Mars years
26 March 2041 36,525 100 Earth years
15 May 2041 36,575 19 Cobalt 60 half-lives
5 October 2041 36,718 32 Pi years
19 October 2041 36,732 37 e years
31 December 2041 36,805 53,000,000 minutes
26 March 2042 36,890 101 Earth years
18 May 2042 36,943 420 Mercury years
14 July 2042 37,000 37,000 days
12 September 2042 37,060 90 Full moon cycles
20 October 2042 37,098 54 Mars years
26 March 2043 37,255 102 Earth years
26 November 2043 37,500 54,000,000 minutes
26 November 2043 37,500 900,000 hours
26 March 2044 37,621 103 Earth years
7 July 2044 37,724 38 e years
6 September 2044 37,785 55 Mars years
14 October 2044 37,823 430 Mercury years
25 November 2044 37,865 33 Pi years
26 March 2045 37,986 104 Earth years
9 April 2045 38,000 38,000 days
15 August 2045 38,128 110 Draconic years
20 October 2045 38,194 55,000,000 minutes
25 October 2045 38,199 170 Venus years
15 November 2045 38,220 1,400 lunar orbits
5 December 2045 38,240 8 Californium 250 half-lives
25 February 2046 38,322 6,000 Pluto days
26 March 2046 38,351 105 Earth years
25 July 2046 38,472 56 Mars years
22 August 2046 38,500 20 Cobalt 60 half-lives
12 March 2047 38,702 440 Mercury years
26 March 2047 38,716 106 Earth years
27 March 2047 38,717 39 e years
15 September 2047 38,889 56,000,000 minutes
29 December 2047 38,994 9 Jupiter years
4 January 2048 39,000 39,000 days
17 January 2048 39,013 34 Pi years
26 March 2048 39,082 107 Earth years
11 June 2048 39,159 57 Mars years
26 March 2049 39,447 108 Earth years
8 August 2049 39,582 450 Mercury years
9 August 2049 39,583 57,000,000 minutes
14 December 2049 39,710 40 e years
26 March 2050 39,812 109 Earth years
29 April 2050 39,846 58 Mars years
30 September 2050 40,000 40,000 days
9 March 2051 40,160 35 Pi years
26 March 2051 40,177 110 Earth years
5 July 2051 40,278 58,000,000 minutes
29 November 2051 40,425 21 Cobalt 60 half-lives
20 December 2051 40,446 180 Venus years
5 January 2052 40,462 460 Mercury years
1 March 2052 40,518 9 Hydrogen 3 (Tritium) half-lives
16 March 2052 40,533 59 Mars years
26 March 2052 40,543 111 Earth years
2 September 2052 40,703 41 e years
26 March 2053 40,908 112 Earth years
7 May 2053 40,950 1,500 lunar orbits
29 May 2053 40,972 59,000,000 minutes
26 June 2053 41,000 41,000 days
21 December 2053 41,178 100 Full moon cycles
1 February 2054 41,220 60 Mars years
26 March 2054 41,273 113 Earth years
30 April 2054 41,308 36 Pi years
2 June 2054 41,341 470 Mercury years
19 July 2054 41,388 3 reigns of Henry VIII
10 February 2055 41,594 120 Draconic years
26 March 2055 41,638 114 Earth years
23 April 2055 41,666 60,000,000 minutes
24 April 2055 41,667 1,000,000 hours
22 May 2055 41,695 42 e years
20 December 2055 41,907 61 Mars years
22 March 2056 42,000 42,000 days
26 March 2056 42,004 115 Earth years
29 October 2056 42,221 480 Mercury years
7 March 2057 42,350 22 Cobalt 60 half-lives
18 March 2057 42,361 61,000,000 minutes
26 March 2057 42,369 116 Earth years
20 June 2057 42,455 37 Pi years
4 November 2057 42,592 4 Curium 243 half-lives
6 November 2057 42,594 62 Mars years
8 February 2058 42,688 43 e years
13 February 2058 42,693 190 Venus years
26 March 2058 42,734 117 Earth years
17 December 2058 43,000 43,000 days
6 January 2059 43,020 9 Californium 250 half-lives
10 February 2059 43,055 62,000,000 minutes
26 March 2059 43,099 118 Earth years
27 March 2059 43,100 490 Mercury years
24 September 2059 43,281 63 Mars years
9 November 2059 43,327 10 Jupiter years
10 November 2059 43,328 4 Saturn years
26 March 2060 43,465 119 Earth years
10 August 2060 43,602 38 Pi years
27 October 2060 43,680 1,600 lunar orbits
28 October 2060 43,681 44 e years
5 January 2061 43,750 63,000,000 minutes
26 March 2061 43,830 120 Earth years
11 August 2061 43,968 64 Mars years
23 August 2061 43,980 500 Mercury years
12 September 2061 44,000 44,000 days
26 March 2062 44,195 121 Earth years
14 June 2062 44,275 23 Cobalt 60 half-lives
30 November 2062 44,444 44444 days
30 November 2062 44,444 64,000,000 minutes
26 March 2063 44,560 122 Earth years
29 June 2063 44,655 65 Mars years
22 August 2063 44,709 7,000 Pluto days
2 October 2063 44,750 39 Pi years
20 January 2064 44,860 510 Mercury years
26 March 2064 44,926 123 Earth years
9 April 2064 44,940 200 Venus years
8 June 2064 45,000 45,000 days
28 June 2064 45,020 10 Hydrogen 3 (Tritium) half-lives
8 August 2064 45,061 130 Draconic years
25 October 2064 45,139 65,000,000 minutes
26 March 2065 45,291 124 Earth years
31 March 2065 45,296 110 Full moon cycles
16 May 2065 45,342 66 Mars years
26 March 2066 45,656 125 Earth years
17 June 2066 45,739 520 Mercury years
19 September 2066 45,833 66,000,000 minutes
19 September 2066 45,833 1,100,000 hours
22 November 2066 45,897 40 Pi years
5 March 2067 46,000 46,000 days
26 March 2067 46,021 126 Earth years
3 April 2067 46,029 67 Mars years
21 September 2067 46,200 24 Cobalt 60 half-lives
26 December 2067 46,296 4 gigaseconds
7 March 2068 46,368 24th Fibonacci number days
26 March 2068 46,387 127 Earth years
18 April 2068 46,410 1,700 lunar orbits
30 May 2068 46,452 2 reigns of Queen Victoria
13 August 2068 46,527 67,000,000 minutes
13 November 2068 46,619 530 Mercury years
18 February 2069 46,716 68 Mars years
26 March 2069 46,752 128 Earth years
29 November 2069 47,000 47,000 days
13 January 2070 47,045 41 Pi years
26 March 2070 47,117 129 Earth years
4 June 2070 47,187 210 Venus years
9 July 2070 47,222 68,000,000 minutes
6 January 2071 47,403 69 Mars years
26 March 2071 47,482 130 Earth years
11 April 2071 47,498 540 Mercury years
20 September 2071 47,660 11 Jupiter years
7 February 2072 47,800 10 Californium 250 half-lives
26 March 2072 47,848 131 Earth years
2 June 2072 47,916 69,000,000 minutes
25 August 2072 48,000 48,000 days
23 November 2072 48,090 70 Mars years
28 December 2072 48,125 25 Cobalt 60 half-lives
5 March 2073 48,192 42 Pi years
26 March 2073 48,213 132 Earth years
7 September 2073 48,378 550 Mercury years
3 February 2074 48,527 140 Draconic years
26 March 2074 48,578 133 Earth years
28 April 2074 48,611 70,000,000 minutes
11 October 2074 48,777 71 Mars years
26 March 2075 48,943 134 Earth years
22 May 2075 49,000 49,000 days
9 October 2075 49,140 1,800 lunar orbits
4 February 2076 49,258 560 Mercury years
22 March 2076 49,305 71,000,000 minutes
26 March 2076 49,309 135 Earth years
26 April 2076 49,340 43 Pi years
9 July 2076 49,414 120 Full moon cycles
29 July 2076 49,434 220 Venus years
28 August 2076 49,464 72 Mars years
25 October 2076 49,522 11 Hydrogen 3 (Tritium) half-lives
26 March 2077 49,674 136 Earth years
15 February 2078 50,000 50,000 days
15 February 2078 50,000 72,000,000 minutes
15 February 2078 50,000 1,200,000 hours
End of time ∞ Infinity-versary

Hide Planets   |   Hide Constants   |   Hide Half-Lives

DateDaysEvent
27 March 1941 1 One day
1 April 1941 6 1st even-perfect-number days
2 April 1941 7 One week
22 April 1941 27 1 lunar orbit
23 April 1941 28 2nd even-perfect-number days
26 April 1941 31 One month
7 May 1941 42 Life-universe-and-everything
20 May 1941 55 10th Fibonacci number days
3 June 1941 69 Naughty-versary
4 June 1941 70 Smallest-weird-number days
23 June 1941 89 11th Fibonacci number days
4 July 1941 100 100 days
27 July 1941 123 123 days
17 August 1941 144 12th Fibonacci number days
12 October 1941 200 200 days
14 November 1941 233 13th Fibonacci number days
24 December 1941 273 10 lunar orbits
20 January 1942 300 300 days
20 January 1942 300 Sparta!
10 February 1942 321 321 days
26 March 1942 365 1 Earth year
7 April 1942 377 14th Fibonacci number days
30 April 1942 400 400 days
4 May 1942 404 Anniversary Not Found
4 August 1942 496 3rd even-perfect-number days
8 August 1942 500 500 days
11 August 1942 503 Anniversary Forbidden
24 August 1942 516 1 Root-2 years
7 November 1942 591 1 Golden ratio years
16 November 1942 600 600 days
26 November 1942 610 15th Fibonacci number days
21 January 1943 666 Lucifersary
11 February 1943 687 1 Mars year
18 February 1943 694 1,000,000 minutes
24 February 1943 700 700 days
26 March 1943 730 2 Earth years
27 April 1943 762 Feynman-point days
4 June 1943 800 800 days
4 August 1943 861 123 weeks
23 August 1943 880 10 Mercury years
12 September 1943 900 900 days
8 December 1943 987 16th Fibonacci number days
14 December 1943 993 1 e years
21 December 1943 1,000 1,000 days
23 January 1944 1,033 2 Root-2 years
26 March 1944 1,096 3 Earth years
10 April 1944 1,111 1111 days
16 May 1944 1,147 1 Pi years
20 June 1944 1,182 2 Golden ratio years
19 July 1944 1,211 4th look-and-say number days
11 August 1944 1,234 1234 days
22 November 1944 1,337 1337 days
20 December 1944 1,365 50 lunar orbits
29 December 1944 1,374 2 Mars years
13 January 1945 1,389 2,000,000 minutes
26 March 1945 1,461 4 Earth years
22 June 1945 1,549 3 Root-2 years
9 August 1945 1,597 17th Fibonacci number days
19 December 1945 1,729 Hardy-Ramanujan-number days
18 January 1946 1,759 20 Mercury years
1 February 1946 1,773 3 Golden ratio years
26 March 1946 1,826 5 Earth years
3 July 1946 1,925 1 Cobalt 60 half-lives
1 September 1946 1,985 2 e years
3 September 1946 1,987 300th prime number (1987) days
16 September 1946 2,000 2,000 days
16 November 1946 2,061 3 Mars years
21 November 1946 2,066 4 Root-2 years
8 December 1946 2,083 3,000,000 minutes
26 March 1947 2,191 6 Earth years
26 April 1947 2,222 2222 days
21 May 1947 2,247 321 weeks
21 May 1947 2,247 10 Venus years
8 July 1947 2,295 2 Pi years
24 July 1947 2,311 5th Euclid-prime days
15 September 1947 2,364 4 Golden ratio years
26 March 1948 2,557 7 Earth years
20 April 1948 2,582 5 Root-2 years
22 April 1948 2,584 18th Fibonacci number days
16 June 1948 2,639 30 Mercury years
15 September 1948 2,730 100 lunar orbits
3 October 1948 2,748 4 Mars years
2 November 1948 2,778 4,000,000 minutes
26 March 1949 2,922 8 Earth years
28 April 1949 2,955 5 Golden ratio years
21 May 1949 2,978 3 e years
12 June 1949 3,000 3,000 days
19 September 1949 3,099 6 Root-2 years
22 December 1949 3,193 500 Pluto days
26 March 1950 3,287 9 Earth years
11 May 1950 3,333 3333 days
21 August 1950 3,435 5 Mars years
28 August 1950 3,442 3 Pi years
21 September 1950 3,466 10 Draconic years
27 September 1950 3,472 5,000,000 minutes
12 November 1950 3,518 40 Mercury years
10 December 1950 3,546 6 Golden ratio years
17 February 1951 3,615 7 Root-2 years
26 March 1951 3,652 10 Earth years
10 October 1951 3,850 2 Cobalt 60 half-lives
8 February 1952 3,971 4 e years
8 March 1952 4,000 4,000 days
26 March 1952 4,018 11 Earth years
20 June 1952 4,104 Second-positive-integer-which-can-be-expressed-as-the-sum-of-two-positive-cubes-in-two-different-ways days
4 July 1952 4,118 10 Full moon cycles
8 July 1952 4,122 6 Mars years
18 July 1952 4,132 8 Root-2 years
23 July 1952 4,137 7 Golden ratio years
22 August 1952 4,167 6,000,000 minutes
22 August 1952 4,167 100,000 hours
5 September 1952 4,181 19th Fibonacci number days
23 January 1953 4,321 4321 days
4 February 1953 4,333 1 Jupiter year
26 March 1953 4,383 12 Earth years
10 April 1953 4,398 50 Mercury years
26 May 1953 4,444 4444 days
15 July 1953 4,494 20 Venus years
23 July 1953 4,502 1 Hydrogen 3 (Tritium) half-lives
19 October 1953 4,590 4 Pi years
16 December 1953 4,648 9 Root-2 years
6 March 1954 4,728 8 Golden ratio years
26 March 1954 4,748 13 Earth years
27 April 1954 4,780 1 Californium 250 half-lives
26 May 1954 4,809 7 Mars years
17 July 1954 4,861 7,000,000 minutes
28 October 1954 4,964 5 e years
3 December 1954 5,000 5,000 days
12 January 1955 5,040 8th colossally-abundant-number days
26 March 1955 5,113 14 Earth years
17 May 1955 5,165 10 Root-2 years
7 September 1955 5,278 60 Mercury years
18 October 1955 5,319 9 Golden ratio years
7 March 1956 5,460 200 lunar orbits
26 March 1956 5,479 15 Earth years
12 April 1956 5,496 8 Mars years
10 June 1956 5,555 5555 days
11 June 1956 5,556 8,000,000 minutes
14 October 1956 5,681 11 Root-2 years
9 December 1956 5,737 5 Pi years
16 January 1957 5,775 3 Cobalt 60 half-lives
26 March 1957 5,844 16 Earth years
31 May 1957 5,910 10 Golden ratio years
16 July 1957 5,956 6 e years
29 August 1957 6,000 6,000 days
2 February 1958 6,157 70 Mercury years
19 February 1958 6,174 Kaprekar's-constant days
28 February 1958 6,183 9 Mars years
15 March 1958 6,198 12 Root-2 years
26 March 1958 6,209 17 Earth years
6 May 1958 6,250 9,000,000 minutes
20 September 1958 6,387 1,000 Pluto days
12 January 1959 6,501 11 Golden ratio years
26 March 1959 6,574 18 Earth years
26 June 1959 6,666 6666 days
13 August 1959 6,714 13 Root-2 years
9 September 1959 6,741 30 Venus years
3 October 1959 6,765 20th Fibonacci number days
16 January 1960 6,870 10 Mars years
31 January 1960 6,885 6 Pi years
18 March 1960 6,932 20 Draconic years
26 March 1960 6,940 19 Earth years
30 March 1960 6,944 10,000,000 minutes
4 April 1960 6,949 7 e years
25 May 1960 7,000 7,000 days
1 July 1960 7,037 80 Mercury years
25 August 1960 7,092 12 Golden ratio years
10 January 1961 7,230 14 Root-2 years
26 March 1961 7,305 20 Earth years
3 December 1961 7,557 11 Mars years
23 February 1962 7,639 11,000,000 minutes
26 March 1962 7,670 21 Earth years
8 April 1962 7,683 13 Golden ratio years
25 April 1962 7,700 4 Cobalt 60 half-lives
11 June 1962 7,747 15 Root-2 years
11 July 1962 7,777 7777 days
27 November 1962 7,916 90 Mercury years
23 December 1962 7,942 8 e years
19 February 1963 8,000 8,000 days
23 March 1963 8,032 7 Pi years
26 March 1963 8,035 22 Earth years
27 June 1963 8,128 4th even-perfect-number days
28 August 1963 8,190 300 lunar orbits
13 October 1963 8,236 20 Full moon cycles
21 October 1963 8,244 12 Mars years
9 November 1963 8,263 16 Root-2 years
20 November 1963 8,274 14 Golden ratio years
18 January 1964 8,333 12,000,000 minutes
18 January 1964 8,333 200,000 hours
26 March 1964 8,401 23 Earth years
18 November 1964 8,638 1234 weeks
15 December 1964 8,665 2 Jupiter years
26 March 1965 8,766 24 Earth years
9 April 1965 8,780 17 Root-2 years
25 April 1965 8,796 100 Mercury years
3 July 1965 8,865 15 Golden ratio years
26 July 1965 8,888 8888 days
7 September 1965 8,931 13 Mars years
11 September 1965 8,935 9 e years
3 November 1965 8,988 40 Venus years
15 November 1965 9,000 9,000 days
19 November 1965 9,004 2 Hydrogen 3 (Tritium) half-lives
13 December 1965 9,028 13,000,000 minutes
26 March 1966 9,131 25 Earth years
13 May 1966 9,179 8 Pi years
7 September 1966 9,296 18 Root-2 years
14 February 1967 9,456 16 Golden ratio years
26 March 1967 9,496 26 Earth years
29 May 1967 9,560 2 Californium 250 half-lives
26 July 1967 9,618 14 Mars years
2 August 1967 9,625 5 Cobalt 60 half-lives
22 September 1967 9,676 110 Mercury years
7 November 1967 9,722 14,000,000 minutes
6 February 1968 9,813 19 Root-2 years
26 March 1968 9,862 27 Earth years
30 May 1968 9,927 10 e years
10 August 1968 9,999 9999 days
11 August 1968 10,000 10,000 days
27 September 1968 10,047 17 Golden ratio years
26 March 1969 10,227 28 Earth years
12 June 1969 10,305 15 Mars years
4 July 1969 10,327 9 Pi years
6 July 1969 10,329 20 Root-2 years
14 September 1969 10,399 30 Draconic years
2 October 1969 10,417 15,000,000 minutes
17 February 1970 10,555 120 Mercury years
26 March 1970 10,592 29 Earth years
11 May 1970 10,638 18 Golden ratio years
21 May 1970 10,648 1 Curium 243 half-lives
21 November 1970 10,832 1 Saturn year
5 December 1970 10,846 21 Root-2 years
17 February 1971 10,920 400 lunar orbits
17 February 1971 10,920 11 e years
15 March 1971 10,946 21st Fibonacci number days
26 March 1971 10,957 30 Earth years
30 April 1971 10,992 16 Mars years
8 May 1971 11,000 11,000 days
27 August 1971 11,111 11111 days
27 August 1971 11,111 16,000,000 minutes
23 December 1971 11,229 19 Golden ratio years
29 December 1971 11,235 50 Venus years
26 March 1972 11,323 31 Earth years
4 May 1972 11,362 22 Root-2 years
16 July 1972 11,435 130 Mercury years
24 August 1972 11,474 10 Pi years
8 November 1972 11,550 6 Cobalt 60 half-lives
2 December 1972 11,574 1 gigasecond
17 March 1973 11,679 17 Mars years
26 March 1973 11,688 32 Earth years
21 July 1973 11,805 17,000,000 minutes
4 August 1973 11,819 20 Golden ratio years
3 October 1973 11,879 23 Root-2 years
6 November 1973 11,913 12 e years
1 February 1974 12,000 12,000 days
26 March 1974 12,053 33 Earth years
12 December 1974 12,314 140 Mercury years
12 January 1975 12,345 12345 days
20 January 1975 12,353 30 Full moon cycles
2 February 1975 12,366 18 Mars years
3 March 1975 12,395 24 Root-2 years
18 March 1975 12,410 21 Golden ratio years
26 March 1975 12,418 34 Earth years
16 June 1975 12,500 18,000,000 minutes
16 June 1975 12,500 300,000 hours
16 October 1975 12,622 11 Pi years
16 March 1976 12,774 2,000 Pluto days
26 March 1976 12,784 35 Earth years
26 July 1976 12,906 13 e years
1 August 1976 12,912 25 Root-2 years
26 October 1976 12,998 3 Jupiter years
28 October 1976 13,000 13,000 days
29 October 1976 13,001 22 Golden ratio years
20 December 1976 13,053 19 Mars years
26 March 1977 13,149 36 Earth years
10 May 1977 13,194 19,000,000 minutes
10 May 1977 13,194 150 Mercury years
30 December 1977 13,428 26 Root-2 years
15 February 1978 13,475 7 Cobalt 60 half-lives
22 February 1978 13,482 60 Venus years
18 March 1978 13,506 3 Hydrogen 3 (Tritium) half-lives
26 March 1978 13,514 37 Earth years
12 June 1978 13,592 23 Golden ratio years
9 August 1978 13,650 500 lunar orbits
7 November 1978 13,740 20 Mars years
6 December 1978 13,769 12 Pi years
2 January 1979 13,796 1 reign of Henry VIII
12 March 1979 13,865 40 Draconic years
26 March 1979 13,879 38 Earth years
5 April 1979 13,889 20,000,000 minutes
14 April 1979 13,898 14 e years
31 May 1979 13,945 27 Root-2 years
25 July 1979 14,000 14,000 days
7 October 1979 14,074 160 Mercury years
24 January 1980 14,183 24 Golden ratio years
26 March 1980 14,245 39 Earth years
29 June 1980 14,340 3 Californium 250 half-lives
24 September 1980 14,427 21 Mars years
28 October 1980 14,461 28 Root-2 years
27 February 1981 14,583 21,000,000 minutes
26 March 1981 14,610 40 Earth years
6 September 1981 14,774 25 Golden ratio years
1 January 1982 14,891 15 e years
27 January 1982 14,917 13 Pi years
4 March 1982 14,953 170 Mercury years
26 March 1982 14,975 41 Earth years
28 March 1982 14,977 29 Root-2 years
20 April 1982 15,000 15,000 days
12 August 1982 15,114 22 Mars years
23 January 1983 15,278 22,000,000 minutes
26 March 1983 15,340 42 Earth years
20 April 1983 15,365 26 Golden ratio years
25 May 1983 15,400 8 Cobalt 60 half-lives
27 August 1983 15,494 30 Root-2 years
26 March 1984 15,706 43 Earth years
18 April 1984 15,729 70 Venus years
29 June 1984 15,801 23 Mars years
31 July 1984 15,833 180 Mercury years
20 September 1984 15,884 16 e years
1 December 1984 15,956 27 Golden ratio years
17 December 1984 15,972 23,000,000 minutes
14 January 1985 16,000 16,000 days
24 January 1985 16,010 31 Root-2 years
19 March 1985 16,064 14 Pi years
26 March 1985 16,071 44 Earth years
29 January 1986 16,380 600 lunar orbits
26 March 1986 16,436 45 Earth years
30 April 1986 16,471 40 Full moon cycles
17 May 1986 16,488 24 Mars years
25 June 1986 16,527 32 Root-2 years
15 July 1986 16,547 28 Golden ratio years
12 November 1986 16,667 24,000,000 minutes
12 November 1986 16,667 400,000 hours
27 December 1986 16,712 190 Mercury years
26 March 1987 16,801 46 Earth years
10 June 1987 16,877 17 e years
11 October 1987 17,000 17,000 days
23 November 1987 17,043 33 Root-2 years
26 February 1988 17,138 29 Golden ratio years
26 March 1988 17,167 47 Earth years
3 April 1988 17,175 25 Mars years
9 May 1988 17,211 15 Pi years
31 August 1988 17,325 9 Cobalt 60 half-lives
6 September 1988 17,331 50 Draconic years
6 September 1988 17,331 4 Jupiter years
6 October 1988 17,361 25,000,000 minutes
26 March 1989 17,532 48 Earth years
23 April 1989 17,560 34 Root-2 years
25 May 1989 17,592 200 Mercury years
21 September 1989 17,711 22nd Fibonacci number days
9 October 1989 17,729 30 Golden ratio years
19 February 1990 17,862 26 Mars years
26 February 1990 17,869 18 e years
26 March 1990 17,897 49 Earth years
13 June 1990 17,976 80 Venus years
7 July 1990 18,000 18,000 days
15 July 1990 18,008 4 Hydrogen 3 (Tritium) half-lives
31 August 1990 18,055 26,000,000 minutes
21 September 1990 18,076 35 Root-2 years
26 March 1991 18,262 50 Earth years
23 May 1991 18,320 31 Golden ratio years
1 July 1991 18,359 16 Pi years
22 October 1991 18,472 210 Mercury years
7 January 1992 18,549 27 Mars years
20 February 1992 18,593 36 Root-2 years
26 March 1992 18,628 51 Earth years
26 July 1992 18,750 27,000,000 minutes
15 November 1992 18,862 19 e years
3 January 1993 18,911 32 Golden ratio years
26 March 1993 18,993 52 Earth years
2 April 1993 19,000 19,000 days
20 July 1993 19,109 37 Root-2 years
21 July 1993 19,110 700 lunar orbits
31 July 1993 19,120 4 Californium 250 half-lives
10 September 1993 19,161 3,000 Pluto days
24 November 1993 19,236 28 Mars years
8 December 1993 19,250 10 Cobalt 60 half-lives
19 March 1994 19,351 220 Mercury years
26 March 1994 19,358 53 Earth years
20 June 1994 19,444 28,000,000 minutes
17 August 1994 19,502 33 Golden ratio years
21 August 1994 19,506 17 Pi years
19 December 1994 19,626 38 Root-2 years
26 March 1995 19,723 54 Earth years
5 August 1995 19,855 20 e years
12 October 1995 19,923 29 Mars years
28 December 1995 20,000 20,000 days
26 March 1996 20,089 55 Earth years
30 March 1996 20,093 34 Golden ratio years
15 May 1996 20,139 29,000,000 minutes
18 May 1996 20,142 39 Root-2 years
7 August 1996 20,223 90 Venus years
15 August 1996 20,231 230 Mercury years
26 March 1997 20,454 56 Earth years
8 August 1997 20,589 50 Full moon cycles
29 August 1997 20,610 30 Mars years
12 October 1997 20,654 18 Pi years
17 October 1997 20,659 40 Root-2 years
11 November 1997 20,684 35 Golden ratio years
4 March 1998 20,797 60 Draconic years
26 March 1998 20,819 57 Earth years
9 April 1998 20,833 30,000,000 minutes
9 April 1998 20,833 500,000 hours
24 April 1998 20,848 21 e years
23 September 1998 21,000 21,000 days
11 January 1999 21,110 240 Mercury years
17 March 1999 21,175 41 Root-2 years
17 March 1999 21,175 11 Cobalt 60 half-lives
26 March 1999 21,184 58 Earth years
25 June 1999 21,275 36 Golden ratio years
16 July 1999 21,296 2 Curium 243 half-lives
17 July 1999 21,297 31 Mars years
4 March 2000 21,528 31,000,000 minutes
26 March 2000 21,550 59 Earth years
18 July 2000 21,664 5 Jupiter years
18 July 2000 21,664 2 Saturn years
14 August 2000 21,691 42 Root-2 years
2 December 2000 21,801 19 Pi years
10 January 2001 21,840 800 lunar orbits
10 January 2001 21,840 22 e years
5 February 2001 21,866 37 Golden ratio years
26 March 2001 21,915 60 Earth years
3 June 2001 21,984 32 Mars years
9 June 2001 21,990 250 Mercury years
19 June 2001 22,000 22,000 days
13 January 2002 22,208 43 Root-2 years
27 January 2002 22,222 22222 days
27 January 2002 22,222 32,000,000 minutes
26 March 2002 22,280 61 Earth years
19 September 2002 22,457 38 Golden ratio years
2 October 2002 22,470 100 Venus years
11 November 2002 22,510 5 Hydrogen 3 (Tritium) half-lives
26 March 2003 22,645 62 Earth years
21 April 2003 22,671 33 Mars years
13 June 2003 22,724 44 Root-2 years
30 September 2003 22,833 23 e years
6 November 2003 22,870 260 Mercury years
23 December 2003 22,917 33,000,000 minutes
24 January 2004 22,949 20 Pi years
15 March 2004 23,000 23,000 days
26 March 2004 23,011 63 Earth years
2 May 2004 23,048 39 Golden ratio years
23 June 2004 23,100 12 Cobalt 60 half-lives
10 August 2004 23,148 2 gigaseconds
27 October 2004 23,226 1 reign of Queen Victoria
8 March 2005 23,358 34 Mars years
26 March 2005 23,376 64 Earth years
16 November 2005 23,611 34,000,000 minutes
14 December 2005 23,639 40 Golden ratio years
26 March 2006 23,741 65 Earth years
3 April 2006 23,749 270 Mercury years
19 June 2006 23,826 24 e years
1 September 2006 23,900 5 Californium 250 half-lives
10 December 2006 24,000 24,000 days
24 January 2007 24,045 35 Mars years
16 March 2007 24,096 21 Pi years
26 March 2007 24,106 66 Earth years
28 July 2007 24,230 41 Golden ratio years
30 August 2007 24,263 70 Draconic years
11 October 2007 24,305 35,000,000 minutes
26 March 2008 24,472 67 Earth years
2 July 2008 24,570 900 lunar orbits
30 August 2008 24,629 280 Mercury years
16 November 2008 24,707 60 Full moon cycles
26 November 2008 24,717 110 Venus years
11 December 2008 24,732 36 Mars years
8 March 2009 24,819 25 e years
10 March 2009 24,821 42 Golden ratio years
26 March 2009 24,837 68 Earth years
5 September 2009 25,000 25,000 days
5 September 2009 25,000 36,000,000 minutes
5 September 2009 25,000 600,000 hours
30 September 2009 25,025 13 Cobalt 60 half-lives
26 March 2010 25,202 69 Earth years
7 May 2010 25,244 22 Pi years
22 October 2010 25,412 43 Golden ratio years
29 October 2010 25,419 37 Mars years
26 January 2011 25,508 290 Mercury years
7 March 2011 25,548 4,000 Pluto days
26 March 2011 25,567 70 Earth years
31 July 2011 25,694 37,000,000 minutes
25 November 2011 25,811 26 e years
26 March 2012 25,933 71 Earth years
28 May 2012 25,996 6 Jupiter years
1 June 2012 26,000 26,000 days
4 June 2012 26,003 44 Golden ratio years
15 September 2012 26,106 38 Mars years
26 March 2013 26,298 72 Earth years
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