Spring Phenomena
25 BCE to 38 CE
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The first table below gives the Julian calendar dates and Greenwich times of the astronomical vernal equinox for the years 25 BCE through 38 CE inclusive. The second table gives, for these years, the Julian calendar dates and Greenwich times of the astronomical Full Moons which occurred on or after the date of the equinox, and the dates and times of the astronomical New Moons on or preceding, and after, the date of the equinox. The days of the week are given for the equinoxes and the Full Moons, from which the days of the week may readily be found for the New Moons.

The times given in the tables are accurate to within two or three hours for 25 to 5 BCE, and one or two hours for 4 BCE to 38 CE. The uncertainty in these times arises from the stochastic, that is unpredictable, change in the Earth's rotation rate.


        VERNAL EQUINOX

  Julian      Greenwich
Calendar Date   Time      Day of Week
BCE  March
25    22       8 p.m.     Saturday
24    23       2 a.m.     Monday
23    23       8 a.m.     Tuesday
22    23       1 p.m.     Wednesday
21    22       7 p.m.     Thursday
20    23       1 a.m.     Saturday
19    23       7 a.m.     Sunday
18    23       1 p.m.     Monday
17    22       6 p.m.     Tuesday
16    23       0*         Thursday
15    23       6 a.m.     Friday
14    23       Noon       Saturday
13    22       6 p.m.     Sunday
12    22      11 p.m.     Monday
11    23       5 a.m.     Wednesday
10    23      11 a.m.     Thursday
 9    22       5 p.m.     Friday
 8    22      11 p.m.     Saturday
 7    23       5 a.m.     Monday
 6    23      10 a.m.     Tuesday
 5    22       4 p.m.     Wednesday
 4    22      10 p.m.     Thursday
 3    23       4 a.m.     Saturday
 2    23      10 a.m.     Sunday
 1    22       3 p.m.     Monday
CE
 1    22       9 p.m.     Tuesday
 2    23       3 a.m.     Thursday
 3    23       9 a.m.     Friday
 4    22       3 p m.     Saturday
 5    22       8 p.m.     Sunday
 6    23       2 a.m.     Tuesday
 7    23        8 a.m.    Wednesday
 8    22        2 p.m.    Thursday
 9    22        8 p.m.    Friday
10    23        1 a.m.    Sunday
11    23        7 a.m.    Monday
12    22        1 p.m.    Tuesday
13    22        7 p.m.    Wednesday
14    23        1 a.m.    Friday
15    23        7 a.m.    Saturday
16    22        Noon      Sunday
17    22        6 p.m.    Monday
18    23        0*        Wednesday
19    23        6 a.m.    Thursday
20    22        Noon      Friday
21    22        6 p.m.    Saturday
22    22       11 p.m.    Sunday
23    23        5 a.m.    Tuesday
24    22       11 a.m.    Wednesday
25    22        5 p.m.    Thursday
26    22       10 p.m.    Friday
27    23        4 a.m.    Sunday
28    22       10 a.m.    Monday
29    22        4 p.m.    Tuesday
30    22       10 p.m.    Wednesday
31    23        3 a.m.    Friday
32    22        9 a.m.    Saturday
33    22        3 p.m.    Sunday
34    22        9 p.m.    Monday
35    23        3 a.m.    Wednesday
36    22        9 a.m.    Thursday
37    22        2 p.m.    Friday
38    22        8 p.m.    Saturday

* Midnight at the beginning
of March 23.


       FULL MOON

    On or next after
    date of equinox

  Julian    Greenwich  Week
 Cal. Date    Time     Day
BCE
25 April  3   4 a.m.   Thu.
24 March 23   9 p.m.   Mon.
23 April 11   9 p.m.   Sun.
22 April  1   6 a.m.   Fri.
21 April 19   1 a.m.   Thu.

20 April  8   3 a.m.   Mon.
19 March 28   5 a.m.   Fri.
18 April 16   0*       Thu.
17 April  4   Noon     Mon.
16 March 25   4 a.m.   Sat.

15 April 13   5 a.m.   Fri.
14 April  2   7 p.m.   Tue.
13 April 20   5 p.m.   Mon.
12 April  9   9 p.m.   Fri.
11 March 29  10 p.m.   Tue.

10 April 17   4 p.m.   Mon.
 9 April  5  10 p.m.   Fri.
 8 March 26  11 a.m.   Wed.
 7 April 14   Noon     Tue.
 6 April  4   5 a.m.   Sun.

 5 March 23   6 p.m.   Thu.
 4 April 11   3 p.m.   Wed.
 3 March 31   6 p.m.   Sun.
 2 April 19  10 a.m.   Sat.
 1 April  7   Noon     Wed.

CE
 1 March 27   9 p.m.   Sun.
 2 April 15   7 p.m.   Sat.
 3 April  5   Noon     Thu.
 4 March 25   5 a.m.   Tue.
 5 April 13   3 a.m.   Mon.

 6 April  2  11 a.m.   Fri.
 7 April 21   5 a.m.   Thu. (1)
 8 April  9   6 a.m.   Mon.
 9 March 29   9 a.m.   Fri.
10 April 17   6 a.m.   Thu.

11 April  6   7 p.m.   Mon.
12 March 26   Noon     Sat.
13 April 14   Noon     Fri.
14 April  4   2 a.m.   Wed.
15 March 24   7 a.m.   Sun.

16 April 11   0*       Sat.
17 March 31   1 a.m.   Wed.
18 April 18   7 p.m.   Mon.
19 April  8   4 a.m.   Sat.
20 March 27   7 p.m.   Wed.

21 April 15   8 p.m.   Tue.
22 April  5   Noon     Sun.
23 March 25  11 p.m.   Thu.
24 April 12   6 p.m.   Wed.
25 April  1   7 p.m.   Sun.

26 April 20   Noon     Sat. (2)
27 April  9   4 p.m.   Wed.
28 March 29   3 a.m.   Mon.
29 April 17   3 a.m.   Sun.
30 April  6   8 p.m.   Thu.

31 March 27  11 a.m.   Tue.
32 April 14   9 a.m.   Mon.
33 April  3   3 p.m.   Fri.
34 March 23   3 p.m.   Tue.
35 April 11   8 a.m.   Mon.

36 March 30   2 p.m.   Fri.
37 April 18   Noon     Thu.
38 April  8   3 a.m.   Tue.



              NEW MOON
  On or preceding
  date of equinox     Following equinox

Julian    Greenwich   Julian   Greenwich
Cal. Date    Time     Cal. Date   Time
BCE
25 March 19   Noon     April 18   4 a.m.
24 March  8   2 p.m.   April  7   5 a.m.
23 Feb.  25   8 p.m.   March 27   9 a.m.
22 March 16   7 p.m.   April 15   6 a.m.
21 March  5  11 a.m.   April  3   7 p.m.

20 Feb.  23   4 a.m.   March 24   1 p.m.
19 March 14   4 a.m.   April 12   1 p.m.
18 March  3   Noon     April  2   2 a.m.
17 March 21   8 a.m.   April 19   9 p.m.
16 March 10   8 a.m.   April  9   0*

15 Feb.  27  10 a.m.   March 29   1 a.m.
14 March 18   6 a.m.   April 16   7 p.m.
13 March  6   6 p.m.   April  5   4 a.m.
12 Feb.  24  11 a.m.   March 25   7 p.m.
11 March 15   Noon     April 13   8 p.m.

10 March  5   2 a.m.   April  3   Noon
9  March 22  11 p.m.   April 21  11 a.m.
8  March 12   3 a.m.   April 10   6 p.m.
7  March  1   3 a.m.   March 30   7 p.m.
6  March 19   9 p.m.   April 18   Noon

5  March  8   5 a.m.   April  6   5 p.m.
4  Feb.  25   6 p.m.   March 27   4 a.m.
3  March 16   7 p.m.   April 15   4 a.m.
2  March  6   Noon     April  4   9 p.m.
1  Feb.  24   0*       March 24   Noon

CE
1  March 13   8 p.m.   April 12   9 a.m.
2  March  2  10 p.m.   April  1   2 p.m.
3  March 21   3 p.m.   April 20   7 a.m.
4  March  9   6 p.m.   April  8   9 a.m.
5  Feb.  27   3 a.m.   March 28   2 p.m.

6  March 18   3 a.m.   April 16   Noon
7  March  7   8 p.m.   April  6   4 a.m.
8  Feb.  25   Noon     March 25   9 p.m.
9  March 15  10 a.m.   April 13   9 p.m.
10 March  4   4 p.m.   April  3   6 a.m.

11 March 23  10 a.m.   April 22   1 a.m.
12 March 11  11 a.m.   April 10   3 a.m.
13 Feb.  28   3 p.m.   March 30   5 a.m.
14 March 19   Noon     April 18   0*
15 March  9   2 a.m.   April  7  11 a.m.

16 Feb.  26   8 p.m.   March 27   4 a.m.
17 March 16   8 p.m.   April 15   4 a.m.
18 March  6   7 a.m.   April  4   7 p.m.
19 Feb.  23   Noon     March 25   3 a.m.
20 March 13   5 a.m.   April 11   9 p.m.

21 March  2   6 a.m.   March 31  10 p.m.
22 March 21   1 a.m.   April 19   3 p.m.
23 March 10  11 a.m.   April  8  10 p.m.
24 Feb.  28   2 a.m.   March 28  11 a.m.
25 March 18   4 a.m.   April 16   Noon

26 March  7   7 p.m.   April  6   5 a.m.
27 Feb.  25   4 a.m.   March 26   5 p.m.
28 March 15   0*       April 13   2 p.m.
29 March  4   0*       April  2   5 p.m.
30 March 22   6 p.m.   April 21   9 a.m.

31 March 11  11 p.m.   April 10   Noon
32 Feb.  29  10 a.m.   March 29   8 p.m.
33 March 19  10 a.m.   April 17   7 p.m.
34 March  9   4 a.m.   April  7   Noon
35 Feb.  26   6 p.m.   March 28   4 a.m.

36 March 16   3 p.m.   April 15   3 a.m.
37 March  5   7 p.m.   April  4  10 a.m.
38 Feb.  22   7 p.m.   March 24   Noon

(1) Preceding Full Moon, March 22, 1 p.m.
(2) Preceding Full Moon, March 21, 9 p.m.

* Midnight at the beginning
of the given date.