Mathaversaries

2nd July, 1928

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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
2 July 2013 31,046 85 Earth years
29 November 2013 31,196 90 Draconic years
22 January 2014 31,250 45,000,000 minutes
2 July 2014 31,411 86 Earth years
18 August 2014 31,458 140 Venus years
13 October 2014 31,514 7 Hydrogen 3 (Tritium) half-lives
9 January 2015 31,602 46 Mars years
14 March 2015 31,666 360 Mercury years
24 June 2015 31,768 32 e years
2 July 2015 31,776 87 Earth years
8 December 2015 31,935 5,000 Pluto days
17 December 2015 31,944 46,000,000 minutes
17 December 2015 31,944 3 Curium 243 half-lives
11 February 2016 32,000 32,000 days
18 June 2016 32,128 28 Pi years
2 July 2016 32,142 88 Earth years
26 November 2016 32,289 47 Mars years
21 June 2017 32,496 3 Saturn years
2 July 2017 32,507 89 Earth years
9 August 2017 32,545 370 Mercury years
11 November 2017 32,639 47,000,000 minutes
5 February 2018 32,725 17 Cobalt 60 half-lives
12 March 2018 32,760 1,200 lunar orbits
13 March 2018 32,761 33 e years
2 July 2018 32,872 90 Earth years
10 September 2018 32,942 80 Full moon cycles
14 October 2018 32,976 48 Mars years
7 November 2018 33,000 33,000 days
2 July 2019 33,237 91 Earth years
10 August 2019 33,276 29 Pi years
6 October 2019 33,333 33333 days
6 October 2019 33,333 48,000,000 minutes
6 October 2019 33,333 800,000 hours
6 January 2020 33,425 380 Mercury years
10 February 2020 33,460 7 Californium 250 half-lives
2 July 2020 33,603 92 Earth years
31 August 2020 33,663 49 Mars years
12 October 2020 33,705 150 Venus years
29 November 2020 33,753 34 e years
2 July 2021 33,968 93 Earth years
3 August 2021 34,000 34,000 days
31 August 2021 34,028 49,000,000 minutes
3 June 2022 34,304 390 Mercury years
2 July 2022 34,333 94 Earth years
19 July 2022 34,350 50 Mars years
30 September 2022 34,423 30 Pi years
15 May 2023 34,650 18 Cobalt 60 half-lives
27 May 2023 34,662 100 Draconic years
27 May 2023 34,662 8 Jupiter years
2 July 2023 34,698 95 Earth years
26 July 2023 34,722 3 gigaseconds
26 July 2023 34,722 50,000,000 minutes
19 August 2023 34,746 35 e years
29 April 2024 35,000 35,000 days
5 June 2024 35,037 51 Mars years
2 July 2024 35,064 96 Earth years
30 October 2024 35,184 400 Mercury years
19 June 2025 35,416 51,000,000 minutes
2 July 2025 35,429 97 Earth years
1 September 2025 35,490 1,300 lunar orbits
20 November 2025 35,570 31 Pi years
23 April 2026 35,724 52 Mars years
8 May 2026 35,739 36 e years
2 July 2026 35,794 98 Earth years
7 December 2026 35,952 160 Venus years
24 January 2027 36,000 36,000 days
9 February 2027 36,016 8 Hydrogen 3 (Tritium) half-lives
29 March 2027 36,064 410 Mercury years
15 May 2027 36,111 52,000,000 minutes
2 July 2027 36,159 99 Earth years
10 March 2028 36,411 53 Mars years
2 July 2028 36,525 100 Earth years
21 August 2028 36,575 19 Cobalt 60 half-lives
11 January 2029 36,718 32 Pi years
25 January 2029 36,732 37 e years
8 April 2029 36,805 53,000,000 minutes
2 July 2029 36,890 101 Earth years
24 August 2029 36,943 420 Mercury years
20 October 2029 37,000 37,000 days
19 December 2029 37,060 90 Full moon cycles
26 January 2030 37,098 54 Mars years
2 July 2030 37,255 102 Earth years
4 March 2031 37,500 54,000,000 minutes
4 March 2031 37,500 900,000 hours
2 July 2031 37,620 103 Earth years
14 October 2031 37,724 38 e years
14 December 2031 37,785 55 Mars years
21 January 2032 37,823 430 Mercury years
3 March 2032 37,865 33 Pi years
2 July 2032 37,986 104 Earth years
16 July 2032 38,000 38,000 days
21 November 2032 38,128 110 Draconic years
26 January 2033 38,194 55,000,000 minutes
31 January 2033 38,199 170 Venus years
21 February 2033 38,220 1,400 lunar orbits
13 March 2033 38,240 8 Californium 250 half-lives
3 June 2033 38,322 6,000 Pluto days
2 July 2033 38,351 105 Earth years
31 October 2033 38,472 56 Mars years
28 November 2033 38,500 20 Cobalt 60 half-lives
18 June 2034 38,702 440 Mercury years
2 July 2034 38,716 106 Earth years
3 July 2034 38,717 39 e years
22 December 2034 38,889 56,000,000 minutes
6 April 2035 38,994 9 Jupiter years
12 April 2035 39,000 39,000 days
25 April 2035 39,013 34 Pi years
2 July 2035 39,081 107 Earth years
18 September 2035 39,159 57 Mars years
2 July 2036 39,447 108 Earth years
14 November 2036 39,582 450 Mercury years
15 November 2036 39,583 57,000,000 minutes
22 March 2037 39,710 40 e years
2 July 2037 39,812 109 Earth years
5 August 2037 39,846 58 Mars years
6 January 2038 40,000 40,000 days
15 June 2038 40,160 35 Pi years
2 July 2038 40,177 110 Earth years
11 October 2038 40,278 58,000,000 minutes
7 March 2039 40,425 21 Cobalt 60 half-lives
28 March 2039 40,446 180 Venus years
13 April 2039 40,462 460 Mercury years
8 June 2039 40,518 9 Hydrogen 3 (Tritium) half-lives
23 June 2039 40,533 59 Mars years
2 July 2039 40,542 111 Earth years
10 December 2039 40,703 41 e years
2 July 2040 40,908 112 Earth years
13 August 2040 40,950 1,500 lunar orbits
4 September 2040 40,972 59,000,000 minutes
2 October 2040 41,000 41,000 days
29 March 2041 41,178 100 Full moon cycles
10 May 2041 41,220 60 Mars years
2 July 2041 41,273 113 Earth years
6 August 2041 41,308 36 Pi years
8 September 2041 41,341 470 Mercury years
25 October 2041 41,388 3 reigns of Henry VIII
19 May 2042 41,594 120 Draconic years
2 July 2042 41,638 114 Earth years
30 July 2042 41,666 60,000,000 minutes
31 July 2042 41,667 1,000,000 hours
28 August 2042 41,695 42 e years
28 March 2043 41,907 61 Mars years
29 June 2043 42,000 42,000 days
2 July 2043 42,003 115 Earth years
5 February 2044 42,221 480 Mercury years
13 June 2044 42,350 22 Cobalt 60 half-lives
24 June 2044 42,361 61,000,000 minutes
2 July 2044 42,369 116 Earth years
26 September 2044 42,455 37 Pi years
10 February 2045 42,592 4 Curium 243 half-lives
12 February 2045 42,594 62 Mars years
17 May 2045 42,688 43 e years
22 May 2045 42,693 190 Venus years
2 July 2045 42,734 117 Earth years
25 March 2046 43,000 43,000 days
14 April 2046 43,020 9 Californium 250 half-lives
19 May 2046 43,055 62,000,000 minutes
2 July 2046 43,099 118 Earth years
3 July 2046 43,100 490 Mercury years
31 December 2046 43,281 63 Mars years
15 February 2047 43,327 10 Jupiter years
16 February 2047 43,328 4 Saturn years
2 July 2047 43,464 119 Earth years
17 November 2047 43,602 38 Pi years
3 February 2048 43,680 1,600 lunar orbits
4 February 2048 43,681 44 e years
13 April 2048 43,750 63,000,000 minutes
2 July 2048 43,830 120 Earth years
17 November 2048 43,968 64 Mars years
29 November 2048 43,980 500 Mercury years
19 December 2048 44,000 44,000 days
2 July 2049 44,195 121 Earth years
20 September 2049 44,275 23 Cobalt 60 half-lives
8 March 2050 44,444 44444 days
8 March 2050 44,444 64,000,000 minutes
2 July 2050 44,560 122 Earth years
5 October 2050 44,655 65 Mars years
28 November 2050 44,709 7,000 Pluto days
8 January 2051 44,750 39 Pi years
28 April 2051 44,860 510 Mercury years
2 July 2051 44,925 123 Earth years
17 July 2051 44,940 200 Venus years
15 September 2051 45,000 45,000 days
5 October 2051 45,020 10 Hydrogen 3 (Tritium) half-lives
15 November 2051 45,061 130 Draconic years
1 February 2052 45,139 65,000,000 minutes
2 July 2052 45,291 124 Earth years
7 July 2052 45,296 110 Full moon cycles
22 August 2052 45,342 66 Mars years
2 July 2053 45,656 125 Earth years
23 September 2053 45,739 520 Mercury years
26 December 2053 45,833 66,000,000 minutes
26 December 2053 45,833 1,100,000 hours
28 February 2054 45,897 40 Pi years
11 June 2054 46,000 46,000 days
2 July 2054 46,021 126 Earth years
10 July 2054 46,029 67 Mars years
28 December 2054 46,200 24 Cobalt 60 half-lives
3 April 2055 46,296 4 gigaseconds
14 June 2055 46,368 24th Fibonacci number days
2 July 2055 46,386 127 Earth years
26 July 2055 46,410 1,700 lunar orbits
6 September 2055 46,452 2 reigns of Queen Victoria
20 November 2055 46,527 67,000,000 minutes
20 February 2056 46,619 530 Mercury years
27 May 2056 46,716 68 Mars years
2 July 2056 46,752 128 Earth years
7 March 2057 47,000 47,000 days
21 April 2057 47,045 41 Pi years
2 July 2057 47,117 129 Earth years
10 September 2057 47,187 210 Venus years
15 October 2057 47,222 68,000,000 minutes
14 April 2058 47,403 69 Mars years
2 July 2058 47,482 130 Earth years
18 July 2058 47,498 540 Mercury years
27 December 2058 47,660 11 Jupiter years
16 May 2059 47,800 10 Californium 250 half-lives
2 July 2059 47,847 131 Earth years
9 September 2059 47,916 69,000,000 minutes
2 December 2059 48,000 48,000 days
1 March 2060 48,090 70 Mars years
5 April 2060 48,125 25 Cobalt 60 half-lives
11 June 2060 48,192 42 Pi years
2 July 2060 48,213 132 Earth years
14 December 2060 48,378 550 Mercury years
12 May 2061 48,527 140 Draconic years
2 July 2061 48,578 133 Earth years
4 August 2061 48,611 70,000,000 minutes
17 January 2062 48,777 71 Mars years
2 July 2062 48,943 134 Earth years
28 August 2062 49,000 49,000 days
15 January 2063 49,140 1,800 lunar orbits
13 May 2063 49,258 560 Mercury years
29 June 2063 49,305 71,000,000 minutes
2 July 2063 49,308 135 Earth years
3 August 2063 49,340 43 Pi years
16 October 2063 49,414 120 Full moon cycles
5 November 2063 49,434 220 Venus years
5 December 2063 49,464 72 Mars years
1 February 2064 49,522 11 Hydrogen 3 (Tritium) half-lives
2 July 2064 49,674 136 Earth years
24 May 2065 50,000 50,000 days
24 May 2065 50,000 72,000,000 minutes
24 May 2065 50,000 1,200,000 hours
End of time ∞ Infinity-versary

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DateDaysEvent
3 July 1928 1 One day
8 July 1928 6 1st even-perfect-number days
9 July 1928 7 One week
29 July 1928 27 1 lunar orbit
30 July 1928 28 2nd even-perfect-number days
2 August 1928 31 One month
13 August 1928 42 Life-universe-and-everything
26 August 1928 55 10th Fibonacci number days
9 September 1928 69 Naughty-versary
10 September 1928 70 Smallest-weird-number days
29 September 1928 89 11th Fibonacci number days
10 October 1928 100 100 days
2 November 1928 123 123 days
23 November 1928 144 12th Fibonacci number days
18 January 1929 200 200 days
20 February 1929 233 13th Fibonacci number days
1 April 1929 273 10 lunar orbits
28 April 1929 300 300 days
28 April 1929 300 Sparta!
19 May 1929 321 321 days
2 July 1929 365 1 Earth year
14 July 1929 377 14th Fibonacci number days
6 August 1929 400 400 days
10 August 1929 404 Anniversary Not Found
10 November 1929 496 3rd even-perfect-number days
14 November 1929 500 500 days
17 November 1929 503 Anniversary Forbidden
30 November 1929 516 1 Root-2 years
13 February 1930 591 1 Golden ratio years
22 February 1930 600 600 days
4 March 1930 610 15th Fibonacci number days
29 April 1930 666 Lucifersary
20 May 1930 687 1 Mars year
27 May 1930 694 1,000,000 minutes
2 June 1930 700 700 days
2 July 1930 730 2 Earth years
3 August 1930 762 Feynman-point days
10 September 1930 800 800 days
10 November 1930 861 123 weeks
29 November 1930 880 10 Mercury years
19 December 1930 900 900 days
16 March 1931 987 16th Fibonacci number days
22 March 1931 993 1 e years
29 March 1931 1,000 1,000 days
1 May 1931 1,033 2 Root-2 years
2 July 1931 1,095 3 Earth years
18 July 1931 1,111 1111 days
23 August 1931 1,147 1 Pi years
27 September 1931 1,182 2 Golden ratio years
26 October 1931 1,211 4th look-and-say number days
18 November 1931 1,234 1234 days
29 February 1932 1,337 1337 days
28 March 1932 1,365 50 lunar orbits
6 April 1932 1,374 2 Mars years
21 April 1932 1,389 2,000,000 minutes
2 July 1932 1,461 4 Earth years
28 September 1932 1,549 3 Root-2 years
15 November 1932 1,597 17th Fibonacci number days
27 March 1933 1,729 Hardy-Ramanujan-number days
26 April 1933 1,759 20 Mercury years
10 May 1933 1,773 3 Golden ratio years
2 July 1933 1,826 5 Earth years
9 October 1933 1,925 1 Cobalt 60 half-lives
8 December 1933 1,985 2 e years
10 December 1933 1,987 300th prime number (1987) days
23 December 1933 2,000 2,000 days
22 February 1934 2,061 3 Mars years
27 February 1934 2,066 4 Root-2 years
16 March 1934 2,083 3,000,000 minutes
2 July 1934 2,191 6 Earth years
2 August 1934 2,222 2222 days
27 August 1934 2,247 321 weeks
27 August 1934 2,247 10 Venus years
14 October 1934 2,295 2 Pi years
30 October 1934 2,311 5th Euclid-prime days
22 December 1934 2,364 4 Golden ratio years
2 July 1935 2,556 7 Earth years
28 July 1935 2,582 5 Root-2 years
30 July 1935 2,584 18th Fibonacci number days
23 September 1935 2,639 30 Mercury years
23 December 1935 2,730 100 lunar orbits
10 January 1936 2,748 4 Mars years
9 February 1936 2,778 4,000,000 minutes
2 July 1936 2,922 8 Earth years
4 August 1936 2,955 5 Golden ratio years
27 August 1936 2,978 3 e years
18 September 1936 3,000 3,000 days
26 December 1936 3,099 6 Root-2 years
30 March 1937 3,193 500 Pluto days
2 July 1937 3,287 9 Earth years
17 August 1937 3,333 3333 days
27 November 1937 3,435 5 Mars years
4 December 1937 3,442 3 Pi years
28 December 1937 3,466 10 Draconic years
3 January 1938 3,472 5,000,000 minutes
18 February 1938 3,518 40 Mercury years
18 March 1938 3,546 6 Golden ratio years
26 May 1938 3,615 7 Root-2 years
2 July 1938 3,652 10 Earth years
16 January 1939 3,850 2 Cobalt 60 half-lives
17 May 1939 3,971 4 e years
15 June 1939 4,000 4,000 days
2 July 1939 4,017 11 Earth years
27 September 1939 4,104 Second-positive-integer-which-can-be-expressed-as-the-sum-of-two-positive-cubes-in-two-different-ways days
11 October 1939 4,118 10 Full moon cycles
15 October 1939 4,122 6 Mars years
25 October 1939 4,132 8 Root-2 years
30 October 1939 4,137 7 Golden ratio years
29 November 1939 4,167 6,000,000 minutes
29 November 1939 4,167 100,000 hours
13 December 1939 4,181 19th Fibonacci number days
1 May 1940 4,321 4321 days
13 May 1940 4,333 1 Jupiter year
2 July 1940 4,383 12 Earth years
17 July 1940 4,398 50 Mercury years
1 September 1940 4,444 4444 days
21 October 1940 4,494 20 Venus years
29 October 1940 4,502 1 Hydrogen 3 (Tritium) half-lives
25 January 1941 4,590 4 Pi years
24 March 1941 4,648 9 Root-2 years
12 June 1941 4,728 8 Golden ratio years
2 July 1941 4,748 13 Earth years
3 August 1941 4,780 1 Californium 250 half-lives
1 September 1941 4,809 7 Mars years
23 October 1941 4,861 7,000,000 minutes
3 February 1942 4,964 5 e years
11 March 1942 5,000 5,000 days
20 April 1942 5,040 8th colossally-abundant-number days
2 July 1942 5,113 14 Earth years
23 August 1942 5,165 10 Root-2 years
14 December 1942 5,278 60 Mercury years
24 January 1943 5,319 9 Golden ratio years
14 June 1943 5,460 200 lunar orbits
2 July 1943 5,478 15 Earth years
20 July 1943 5,496 8 Mars years
17 September 1943 5,555 5555 days
18 September 1943 5,556 8,000,000 minutes
21 January 1944 5,681 11 Root-2 years
17 March 1944 5,737 5 Pi years
24 April 1944 5,775 3 Cobalt 60 half-lives
2 July 1944 5,844 16 Earth years
6 September 1944 5,910 10 Golden ratio years
22 October 1944 5,956 6 e years
5 December 1944 6,000 6,000 days
11 May 1945 6,157 70 Mercury years
28 May 1945 6,174 Kaprekar's-constant days
6 June 1945 6,183 9 Mars years
21 June 1945 6,198 12 Root-2 years
2 July 1945 6,209 17 Earth years
12 August 1945 6,250 9,000,000 minutes
27 December 1945 6,387 1,000 Pluto days
20 April 1946 6,501 11 Golden ratio years
2 July 1946 6,574 18 Earth years
2 October 1946 6,666 6666 days
19 November 1946 6,714 13 Root-2 years
16 December 1946 6,741 30 Venus years
9 January 1947 6,765 20th Fibonacci number days
24 April 1947 6,870 10 Mars years
9 May 1947 6,885 6 Pi years
25 June 1947 6,932 20 Draconic years
2 July 1947 6,939 19 Earth years
7 July 1947 6,944 10,000,000 minutes
12 July 1947 6,949 7 e years
1 September 1947 7,000 7,000 days
8 October 1947 7,037 80 Mercury years
2 December 1947 7,092 12 Golden ratio years
18 April 1948 7,230 14 Root-2 years
2 July 1948 7,305 20 Earth years
11 March 1949 7,557 11 Mars years
1 June 1949 7,639 11,000,000 minutes
2 July 1949 7,670 21 Earth years
15 July 1949 7,683 13 Golden ratio years
1 August 1949 7,700 4 Cobalt 60 half-lives
17 September 1949 7,747 15 Root-2 years
17 October 1949 7,777 7777 days
5 March 1950 7,916 90 Mercury years
31 March 1950 7,942 8 e years
28 May 1950 8,000 8,000 days
29 June 1950 8,032 7 Pi years
2 July 1950 8,035 22 Earth years
3 October 1950 8,128 4th even-perfect-number days
4 December 1950 8,190 300 lunar orbits
19 January 1951 8,236 20 Full moon cycles
27 January 1951 8,244 12 Mars years
15 February 1951 8,263 16 Root-2 years
26 February 1951 8,274 14 Golden ratio years
26 April 1951 8,333 12,000,000 minutes
26 April 1951 8,333 200,000 hours
2 July 1951 8,400 23 Earth years
25 February 1952 8,638 1234 weeks
23 March 1952 8,665 2 Jupiter years
2 July 1952 8,766 24 Earth years
16 July 1952 8,780 17 Root-2 years
1 August 1952 8,796 100 Mercury years
9 October 1952 8,865 15 Golden ratio years
1 November 1952 8,888 8888 days
14 December 1952 8,931 13 Mars years
18 December 1952 8,935 9 e years
9 February 1953 8,988 40 Venus years
21 February 1953 9,000 9,000 days
25 February 1953 9,004 2 Hydrogen 3 (Tritium) half-lives
21 March 1953 9,028 13,000,000 minutes
2 July 1953 9,131 25 Earth years
19 August 1953 9,179 8 Pi years
14 December 1953 9,296 18 Root-2 years
23 May 1954 9,456 16 Golden ratio years
2 July 1954 9,496 26 Earth years
4 September 1954 9,560 2 Californium 250 half-lives
1 November 1954 9,618 14 Mars years
8 November 1954 9,625 5 Cobalt 60 half-lives
29 December 1954 9,676 110 Mercury years
13 February 1955 9,722 14,000,000 minutes
15 May 1955 9,813 19 Root-2 years
2 July 1955 9,861 27 Earth years
6 September 1955 9,927 10 e years
17 November 1955 9,999 9999 days
18 November 1955 10,000 10,000 days
4 January 1956 10,047 17 Golden ratio years
2 July 1956 10,227 28 Earth years
18 September 1956 10,305 15 Mars years
10 October 1956 10,327 9 Pi years
12 October 1956 10,329 20 Root-2 years
21 December 1956 10,399 30 Draconic years
8 January 1957 10,417 15,000,000 minutes
26 May 1957 10,555 120 Mercury years
2 July 1957 10,592 29 Earth years
17 August 1957 10,638 18 Golden ratio years
27 August 1957 10,648 1 Curium 243 half-lives
27 February 1958 10,832 1 Saturn year
13 March 1958 10,846 21 Root-2 years
26 May 1958 10,920 400 lunar orbits
26 May 1958 10,920 11 e years
21 June 1958 10,946 21st Fibonacci number days
2 July 1958 10,957 30 Earth years
6 August 1958 10,992 16 Mars years
14 August 1958 11,000 11,000 days
3 December 1958 11,111 11111 days
3 December 1958 11,111 16,000,000 minutes
31 March 1959 11,229 19 Golden ratio years
6 April 1959 11,235 50 Venus years
2 July 1959 11,322 31 Earth years
11 August 1959 11,362 22 Root-2 years
23 October 1959 11,435 130 Mercury years
1 December 1959 11,474 10 Pi years
15 February 1960 11,550 6 Cobalt 60 half-lives
10 March 1960 11,574 1 gigasecond
23 June 1960 11,679 17 Mars years
2 July 1960 11,688 32 Earth years
27 October 1960 11,805 17,000,000 minutes
10 November 1960 11,819 20 Golden ratio years
9 January 1961 11,879 23 Root-2 years
12 February 1961 11,913 12 e years
10 May 1961 12,000 12,000 days
2 July 1961 12,053 33 Earth years
20 March 1962 12,314 140 Mercury years
20 April 1962 12,345 12345 days
28 April 1962 12,353 30 Full moon cycles
11 May 1962 12,366 18 Mars years
9 June 1962 12,395 24 Root-2 years
24 June 1962 12,410 21 Golden ratio years
2 July 1962 12,418 34 Earth years
22 September 1962 12,500 18,000,000 minutes
22 September 1962 12,500 300,000 hours
22 January 1963 12,622 11 Pi years
23 June 1963 12,774 2,000 Pluto days
2 July 1963 12,783 35 Earth years
2 November 1963 12,906 13 e years
8 November 1963 12,912 25 Root-2 years
2 February 1964 12,998 3 Jupiter years
4 February 1964 13,000 13,000 days
5 February 1964 13,001 22 Golden ratio years
28 March 1964 13,053 19 Mars years
2 July 1964 13,149 36 Earth years
16 August 1964 13,194 19,000,000 minutes
16 August 1964 13,194 150 Mercury years
7 April 1965 13,428 26 Root-2 years
24 May 1965 13,475 7 Cobalt 60 half-lives
31 May 1965 13,482 60 Venus years
24 June 1965 13,506 3 Hydrogen 3 (Tritium) half-lives
2 July 1965 13,514 37 Earth years
18 September 1965 13,592 23 Golden ratio years
15 November 1965 13,650 500 lunar orbits
13 February 1966 13,740 20 Mars years
14 March 1966 13,769 12 Pi years
10 April 1966 13,796 1 reign of Henry VIII
18 June 1966 13,865 40 Draconic years
2 July 1966 13,879 38 Earth years
12 July 1966 13,889 20,000,000 minutes
21 July 1966 13,898 14 e years
6 September 1966 13,945 27 Root-2 years
31 October 1966 14,000 14,000 days
13 January 1967 14,074 160 Mercury years
2 May 1967 14,183 24 Golden ratio years
2 July 1967 14,244 39 Earth years
6 October 1967 14,340 3 Californium 250 half-lives
1 January 1968 14,427 21 Mars years
4 February 1968 14,461 28 Root-2 years
5 June 1968 14,583 21,000,000 minutes
2 July 1968 14,610 40 Earth years
13 December 1968 14,774 25 Golden ratio years
9 April 1969 14,891 15 e years
5 May 1969 14,917 13 Pi years
10 June 1969 14,953 170 Mercury years
2 July 1969 14,975 41 Earth years
4 July 1969 14,977 29 Root-2 years
27 July 1969 15,000 15,000 days
18 November 1969 15,114 22 Mars years
1 May 1970 15,278 22,000,000 minutes
2 July 1970 15,340 42 Earth years
27 July 1970 15,365 26 Golden ratio years
31 August 1970 15,400 8 Cobalt 60 half-lives
3 December 1970 15,494 30 Root-2 years
2 July 1971 15,705 43 Earth years
26 July 1971 15,729 70 Venus years
6 October 1971 15,801 23 Mars years
7 November 1971 15,833 180 Mercury years
28 December 1971 15,884 16 e years
9 March 1972 15,956 27 Golden ratio years
25 March 1972 15,972 23,000,000 minutes
22 April 1972 16,000 16,000 days
2 May 1972 16,010 31 Root-2 years
25 June 1972 16,064 14 Pi years
2 July 1972 16,071 44 Earth years
7 May 1973 16,380 600 lunar orbits
2 July 1973 16,436 45 Earth years
6 August 1973 16,471 40 Full moon cycles
23 August 1973 16,488 24 Mars years
1 October 1973 16,527 32 Root-2 years
21 October 1973 16,547 28 Golden ratio years
18 February 1974 16,667 24,000,000 minutes
18 February 1974 16,667 400,000 hours
4 April 1974 16,712 190 Mercury years
2 July 1974 16,801 46 Earth years
16 September 1974 16,877 17 e years
17 January 1975 17,000 17,000 days
1 March 1975 17,043 33 Root-2 years
4 June 1975 17,138 29 Golden ratio years
2 July 1975 17,166 47 Earth years
11 July 1975 17,175 25 Mars years
16 August 1975 17,211 15 Pi years
8 December 1975 17,325 9 Cobalt 60 half-lives
14 December 1975 17,331 50 Draconic years
14 December 1975 17,331 4 Jupiter years
13 January 1976 17,361 25,000,000 minutes
2 July 1976 17,532 48 Earth years
30 July 1976 17,560 34 Root-2 years
31 August 1976 17,592 200 Mercury years
28 December 1976 17,711 22nd Fibonacci number days
15 January 1977 17,729 30 Golden ratio years
28 May 1977 17,862 26 Mars years
4 June 1977 17,869 18 e years
2 July 1977 17,897 49 Earth years
19 September 1977 17,976 80 Venus years
13 October 1977 18,000 18,000 days
21 October 1977 18,008 4 Hydrogen 3 (Tritium) half-lives
7 December 1977 18,055 26,000,000 minutes
28 December 1977 18,076 35 Root-2 years
2 July 1978 18,262 50 Earth years
29 August 1978 18,320 31 Golden ratio years
7 October 1978 18,359 16 Pi years
28 January 1979 18,472 210 Mercury years
15 April 1979 18,549 27 Mars years
29 May 1979 18,593 36 Root-2 years
2 July 1979 18,627 51 Earth years
2 November 1979 18,750 27,000,000 minutes
22 February 1980 18,862 19 e years
11 April 1980 18,911 32 Golden ratio years
2 July 1980 18,993 52 Earth years
9 July 1980 19,000 19,000 days
26 October 1980 19,109 37 Root-2 years
27 October 1980 19,110 700 lunar orbits
6 November 1980 19,120 4 Californium 250 half-lives
17 December 1980 19,161 3,000 Pluto days
2 March 1981 19,236 28 Mars years
16 March 1981 19,250 10 Cobalt 60 half-lives
25 June 1981 19,351 220 Mercury years
2 July 1981 19,358 53 Earth years
26 September 1981 19,444 28,000,000 minutes
23 November 1981 19,502 33 Golden ratio years
27 November 1981 19,506 17 Pi years
27 March 1982 19,626 38 Root-2 years
2 July 1982 19,723 54 Earth years
11 November 1982 19,855 20 e years
18 January 1983 19,923 29 Mars years
5 April 1983 20,000 20,000 days
2 July 1983 20,088 55 Earth years
7 July 1983 20,093 34 Golden ratio years
22 August 1983 20,139 29,000,000 minutes
25 August 1983 20,142 39 Root-2 years
14 November 1983 20,223 90 Venus years
22 November 1983 20,231 230 Mercury years
2 July 1984 20,454 56 Earth years
14 November 1984 20,589 50 Full moon cycles
5 December 1984 20,610 30 Mars years
18 January 1985 20,654 18 Pi years
23 January 1985 20,659 40 Root-2 years
17 February 1985 20,684 35 Golden ratio years
10 June 1985 20,797 60 Draconic years
2 July 1985 20,819 57 Earth years
16 July 1985 20,833 30,000,000 minutes
16 July 1985 20,833 500,000 hours
31 July 1985 20,848 21 e years
30 December 1985 21,000 21,000 days
19 April 1986 21,110 240 Mercury years
23 June 1986 21,175 41 Root-2 years
23 June 1986 21,175 11 Cobalt 60 half-lives
2 July 1986 21,184 58 Earth years
1 October 1986 21,275 36 Golden ratio years
22 October 1986 21,296 2 Curium 243 half-lives
23 October 1986 21,297 31 Mars years
11 June 1987 21,528 31,000,000 minutes
2 July 1987 21,549 59 Earth years
25 October 1987 21,664 5 Jupiter years
25 October 1987 21,664 2 Saturn years
21 November 1987 21,691 42 Root-2 years
10 March 1988 21,801 19 Pi years
18 April 1988 21,840 800 lunar orbits
18 April 1988 21,840 22 e years
14 May 1988 21,866 37 Golden ratio years
2 July 1988 21,915 60 Earth years
9 September 1988 21,984 32 Mars years
15 September 1988 21,990 250 Mercury years
25 September 1988 22,000 22,000 days
21 April 1989 22,208 43 Root-2 years
5 May 1989 22,222 22222 days
5 May 1989 22,222 32,000,000 minutes
2 July 1989 22,280 61 Earth years
26 December 1989 22,457 38 Golden ratio years
8 January 1990 22,470 100 Venus years
17 February 1990 22,510 5 Hydrogen 3 (Tritium) half-lives
2 July 1990 22,645 62 Earth years
28 July 1990 22,671 33 Mars years
19 September 1990 22,724 44 Root-2 years
6 January 1991 22,833 23 e years
12 February 1991 22,870 260 Mercury years
31 March 1991 22,917 33,000,000 minutes
2 May 1991 22,949 20 Pi years
22 June 1991 23,000 23,000 days
2 July 1991 23,010 63 Earth years
9 August 1991 23,048 39 Golden ratio years
30 September 1991 23,100 12 Cobalt 60 half-lives
17 November 1991 23,148 2 gigaseconds
3 February 1992 23,226 1 reign of Queen Victoria
14 June 1992 23,358 34 Mars years
2 July 1992 23,376 64 Earth years
22 February 1993 23,611 34,000,000 minutes
22 March 1993 23,639 40 Golden ratio years
2 July 1993 23,741 65 Earth years
10 July 1993 23,749 270 Mercury years
25 September 1993 23,826 24 e years
8 December 1993 23,900 5 Californium 250 half-lives
18 March 1994 24,000 24,000 days
2 May 1994 24,045 35 Mars years
22 June 1994 24,096 21 Pi years
2 July 1994 24,106 66 Earth years
3 November 1994 24,230 41 Golden ratio years
6 December 1994 24,263 70 Draconic years
17 January 1995 24,305 35,000,000 minutes
2 July 1995 24,471 67 Earth years
9 October 1995 24,570 900 lunar orbits
7 December 1995 24,629 280 Mercury years
23 February 1996 24,707 60 Full moon cycles
4 March 1996 24,717 110 Venus years
19 March 1996 24,732 36 Mars years
14 June 1996 24,819 25 e years
16 June 1996 24,821 42 Golden ratio years
2 July 1996 24,837 68 Earth years
12 December 1996 25,000 25,000 days
12 December 1996 25,000 36,000,000 minutes
12 December 1996 25,000 600,000 hours
6 January 1997 25,025 13 Cobalt 60 half-lives
2 July 1997 25,202 69 Earth years
13 August 1997 25,244 22 Pi years
28 January 1998 25,412 43 Golden ratio years
4 February 1998 25,419 37 Mars years
4 May 1998 25,508 290 Mercury years
13 June 1998 25,548 4,000 Pluto days
2 July 1998 25,567 70 Earth years
6 November 1998 25,694 37,000,000 minutes
3 March 1999 25,811 26 e years
2 July 1999 25,932 71 Earth years
4 September 1999 25,996 6 Jupiter years
8 September 1999 26,000 26,000 days
11 September 1999 26,003 44 Golden ratio years
23 December 1999 26,106 38 Mars years
2 July 2000 26,298 72 Earth years
30 September 2000 26,388 300 Mercury years
1 October 2000 26,389 38,000,000 minutes
3 October 2000 26,391 23 Pi years
2 July 2001 26,663 73 Earth years
9 November 2001 26,793 39 Mars years
20 November 2001 26,804 27 e years
15 April 2002 26,950 14 Cobalt 60 half-lives
29 April 2002 26,964 120 Venus years
4 June 2002 27,000 27,000 days
16 June 2002 27,012 6 Hydrogen 3 (Tritium) half-lives
2 July 2002 27,028 74 Earth years
26 August 2002 27,083 39,000,000 minutes
27 February 2003 27,268 310 Mercury years
31 March 2003 27,300 1,000 lunar orbits
2 July 2003 27,393 75 Earth years
27 September 2003 27,480 40 Mars years
24 November 2003 27,538 24 Pi years
17 January 2004 27,592 2 reigns of Henry VIII
3 June 2004 27,730 80 Draconic years
2 July 2004 27,759 76 Earth years
21 July 2004 27,778 40,000,000 minutes
9 August 2004 27,797 28 e years
28 February 2005 28,000 28,000 days
2 July 2005 28,124 77 Earth years
25 July 2005 28,147 320 Mercury years
14 August 2005 28,167 41 Mars years
15 June 2006 28,472 41,000,000 minutes
2 July 2006 28,489 78 Earth years
17 December 2006 28,657 23rd Fibonacci number days
9 January 2007 28,680 6 Californium 250 half-lives
15 January 2007 28,686 25 Pi years
29 April 2007 28,790 29 e years
3 June 2007 28,825 70 Full moon cycles
2 July 2007 28,854 42 Mars years
2 July 2007 28,854 79 Earth years
23 July 2007 28,875 15 Cobalt 60 half-lives
25 November 2007 29,000 29,000 days
22 December 2007 29,027 330 Mercury years
9 May 2008 29,166 42,000,000 minutes
10 May 2008 29,167 700,000 hours
23 June 2008 29,211 130 Venus years
2 July 2008 29,220 80 Earth years
19 May 2009 29,541 43 Mars years
2 July 2009 29,585 81 Earth years
15 January 2010 29,782 30 e years
7 March 2010 29,833 26 Pi years
4 April 2010 29,861 43,000,000 minutes
19 May 2010 29,906 340 Mercury years
2 July 2010 29,950 82 Earth years
21 August 2010 30,000 30,000 days
20 September 2010 30,030 1,100 lunar orbits
6 April 2011 30,228 44 Mars years
25 April 2011 30,247 4321 weeks
2 July 2011 30,315 83 Earth years
16 July 2011 30,329 7 Jupiter years
27 February 2012 30,555 44,000,000 minutes
2 July 2012 30,681 84 Earth years
4 October 2012 30,775 31 e years
15 October 2012 30,786 350 Mercury years
29 October 2012 30,800 16 Cobalt 60 half-lives
21 February 2013 30,915 45 Mars years
28 April 2013 30,981 27 Pi years
17 May 2013 31,000 31,000 days
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