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C!T ROM 2
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ctrom_ii_b
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JULCAL10
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DATA
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1992-12-21
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79 lines
; beginning of Julian dates
0 -4713 1 1 Mon 0
1 -4713 1 2 Tue 1
2 -4713 1 3 Wed 2
3 -4713 1 4 Thu 3
;
; Julian calendar repeats every 4 years, at 365*4+1 = 1461 day intervals
260424 -4000 1 1 Thu 0
; 1461 4
261885 -3996 1 1 Tue 0
; 1461 4
263346 -3992 1 1 Sun 0
;
; Julian dates near 1 AD (there was no year 0)
1721420 -1 12 28 Tue 362
1721421 -1 12 29 Wed 363
1721422 -1 12 30 Thu 364
1721423 -1 12 31 Fri 365
1721424 1 1 1 Sat 0
1721425 1 1 2 Sun 1
1721426 1 1 3 Mon 2
;
; usual transition dates are:
;
; 2299161 = October 5/15, 1582, as in Rome, or
; 2361222 = September 3/14, 1752, as in the United Kingdom
; and the Colonies (default)
;
; Julian dates near the transition...
;
2361220 1752 9 1 Tue 244
2361221 1752 9 2 Wed 245
2361222 1752 9 14 Thu 246
2361223 1752 9 15 Fri 247
T2299161 ; as in Rome
2299159 1582 10 3 Wed 275
2299160 1582 10 4 Thu 276
2299161 1582 10 15 Fri 277
2299162 1582 10 16 Sat 278
;
; Apart from the 4000 year correction, the Gregorian calendar repeats
; every 400 years, or at ((365*4+1)*25-1)*4+1 = 146097 day intervals
2302526 1592 1 1 Wed 0
; 146097 400
2448623 1992 1 1 Wed 0
; 146097 400
2594720 2392 1 1 Wed 0
; 146097 400
2740817 2792 1 1 Wed 0
;
; Including the 4000 year correction, the Gregorian calendar repeats
; at (((365*4+1)*25-1)*4+1)*10-1 = 1460969 day intervals
2302526 1592 1 1 Wed 0
;1460969 4000
3763495 5592 1 1 Tue 0
;1460969 4000
5224464 9592 1 1 Mon 0
;1460969 4000
6685433 13592 1 1 Sun 0
;
; The USNO time service reports the Modified Julian Date (MJD),
; which is figured by subtracting a constant (2,400,000.5) from the
; Julian Date as of the preceding midnight.
;
; For example, the MJD for 7 Jul 92 was 48806
; offset 2400000.5
; JD at midnight was 2448806.5
; JD at noon was 2448807
;
2448807 1992 7 3 Fri 184
;
; checks on day-of-week calculation...
; "black Tuesday"
2425914 1929 10 29 Tue 301
; "a day that will live in infamy"
2430336 1941 12 7 Sun 340
; "black Monday"
2447088 1987 10 19 Mon 291