Tables 757 and 758 

 CALENDARS 



603 



TABLE 757.— Julian Day Calendar 



Proposed by Scaliger, 1582. Days are numbered consecutively from Greenwich mean 

 noon on January 1, 4713 B. C. Advantage: difference between two dates becomes merely 

 difference between two Julian day numbers. As our civil and astronomical days begin at 

 midnight, the numbers from the table must be increased by one after noon of date. 



Julian Day No. = 2420000 + no. in table. Jan. o, etc., at head of col. means Jan. o until 

 noon, then Jan. 1, etc. 



Year 



1920 

 1921 

 1922 

 1923 

 1924 

 1925 

 1926 

 1927 

 1928 

 1929 

 1930 

 1931 

 1932 

 1933 

 1934 

 I93S 

 1936 

 1937 

 1938 

 1929 

 1940 



Jan. o 



2324 

 2690 

 3055 

 3420 

 3785 

 4151 

 4516 

 4881 

 5246 

 S612 

 5977 

 6342 

 6707 

 7073 

 7438 

 7803 

 8168 

 8534 

 8899 

 9264 

 9629 



Feb. o 



2355 

 2721 

 3086 

 3451 

 3816 

 4182 

 4547 

 4912 

 5277 

 5643 

 6008 

 6373 

 6738 

 7104 

 7469 

 7834 

 8199 

 8565 

 8930 

 9295 

 9660 



Mar. o 



2384 

 2749 

 3114 

 3479 

 3845 

 4210 

 4575 

 4940 

 5306 

 5671 

 6036 

 6401 

 6767 

 7132 

 7497 

 7862 

 8228 

 8593 

 8958 

 9323 

 9689 



Apr. o 



2415 

 2780 

 3145 

 35io 

 3876 

 4241 

 4606 

 4971 

 5337 

 5702 

 6067 

 6432 

 6798 

 7163 

 7528 

 7893 

 8259 

 8624 

 8989 

 9354 

 9720 



May o 



2445 

 2810 

 3175 

 3540 

 3906 

 4271 

 4636 

 5001 

 5367 

 5732 

 6097 

 6462 

 6828 

 7193 

 7558 

 7923 

 8289 

 8654 

 9019 

 9384 

 9750 



Juneo 



2476 

 2841 

 3206 

 3571 

 3937 

 4302 

 4667 

 5032 

 5398 

 5763 

 6128 

 6493 

 6859 

 7224 

 7589 

 7954 

 8320 

 8685 

 9050 

 9415 

 978i 



July o 



2506 

 2871 

 3236 

 3601 

 3967 

 4332 

 4697 

 5062 

 5428 

 5793 

 6158 

 6523 

 6889 

 7254 

 7619 

 7984 

 8350 

 8715 

 9080 

 9445 



Aug. o 



2537 

 2902 

 3267 

 3632 

 3998 

 4363 

 4828 

 5093 

 5459 

 5824 

 6189 

 6554 

 6920 

 7285 

 7650 

 8015 

 8381 

 8746 

 9111 

 9476 

 9842 



Sept. o 



2568 

 2933 

 3298 

 3663 

 4029 

 4394 

 4759 

 5024 

 5490 

 5855 

 6220 

 6585 

 6951 

 73i6 

 7681 



8777 

 9142 

 9507 

 9873 



Oct. o 



2598 

 2963 

 3328 

 3693 

 4059 

 4424 

 4789 

 5154 

 5520 

 5885 

 6250 

 6615 

 6981 

 7346 

 77ii 

 8076 

 8442 

 8807 

 9172 

 9537 

 9903 



Nov. o 



2629 

 2994 

 3359 

 3724 

 4090 

 4455 

 4820 

 5185 

 5551 

 59i6 

 6281 

 6646 

 7012 

 7377 

 7742 

 8107 

 8473 

 8838 

 9203 

 9568 

 9934 



Dec. o 



2659 

 3024 

 3389 

 3754 

 4120 

 4485 

 4850 

 5215 

 5581 

 5940 

 63 1 1 

 6676 

 7042 

 7407 

 7772 

 8137 

 8503 

 8868 

 9233 

 9598 

 9964 



TABLE 758— Perpetual Calendar 

 To find the calendar for any year, e.g., 1924, divide century part of year (19) by 4 and 

 with the remainder (3) enter Dominical Letters table. Use line (3) of lower sections of table 

 corresponding to value of remainder, taking the Dominical Letter corresponding to the 

 column in upper parts of table containing the last two figures of the year in question (24). 

 This being a leap year we find two letters (F) to be used with Jan. and Feb., (E) with the 

 rest of the year. In the second part of the table this Dominical Letter indicates which 

 schedule of week days is to be used with the month in question. E.g., Jan. 1, 1924, comes 

 on Tuesday; July 4 on Friday. 



Year 



No. 



2 Q 



57 

 85 



30 



58 



86 



03 

 31 

 59 

 87 



04 

 32 

 60 



05 

 33 

 61 



So 



06 

 34 

 62 

 90 



07 

 35 

 63 

 91 



08 

 36 

 64 

 92 



09 

 37 

 65 

 93 



38 



66 

 94 



39 

 67 

 95 



96 



13 



41 

 69 

 97 



14 

 42 

 70 



15 

 43 

 71 

 99 



(1) C B 



(2) E D 



(3) G F 



(4) BA G 



G FE D 



B AG F 



D CB A 



E DC B 



B AG F 



D CB A 



F ED C 



G FE D 



D CB 



F ED 



A GF 



B AG 



(1) 

 (2) 

 (3) 

 (4) 



ED C 



GF E 



BA G 



CB A 



A GF E 



C BA G 



E DC B 



F ED C 



C BA G 



E DC B 



G FE D 



A GF E 



E DC 



G FE 



B AG 



C BA 



Month 



Dominical letter 



Jan., Oct. 



Feb., Mar., Nov. 



Apr., July 



May 



June 



Aug. 



Sept., Dec. 



Sun. 



Mon. 



Tues. 



Wed. 



Thurs. 



Fri. 



Sat. 



Sat. 



Sun. 



Mon. 



Tues. 



Wed. 



Thurs. 



Fri. 



Fri. 



Thurs. 



Wed. 



Sat. Fri. Thurs. 



Sun. Sat. Fri. 



Mon. Sun. Sat. 



Tues. Mon. Sun. 



Wed. Tues. Mon. 



Thurs. Wed. Tues. 



Tues. 



Wed. 



Thurs. 



Fri. 



Sat. 



Sun. 



Mon. 



Mon. 



Tues. 



Wed. 



Thurs. 



Fri. 



Sat. 



Sun. 



Note — For general discussion of calendars, see British Nautical Almanac, p. 734 et seq., 1931- 

 Smithsonian Tables 



