The following astronomical data in the first three columns below was obtained from the U.S. Naval Observatory Astronomical Applications Department. The pertinent file may be accessed on the Internet at http://aa.usno.navy.mil/data/docs/SpringPhenom.html .
Note. The times of day given in the second and third columns have been adjusted +2 hours from U.S. Naval Observatory figures to account for the difference between Jerusalem Israel and Greenwich England (universal) time.
It should also be noted that the first evening of a visible crescent moon (column 4) always occurs only minutes after sundown, which is at the very beginning of a new day on the Hebrew calendar. This Hebrew day correlates to the following day on the Julian calendar as noted in the chart below (column 5). Column 6 is Passover dates for the given years.
* Midnight at the end of the given day.
** Conjunction occurs too late in the day for crescent to be seen the next evening.
*** Conjunction occurred on date of Equinox actually preceding it by 4 hours. But as noted above, it is the visible crescent that established the 1st of Nisan which occurred on the 2nd evening after Equinox.
