Copyright © Ambassador College, 1988-1989. All Rights Reserved.
This program is provided for educational purposes only. It is not intended to be a scholarly or authoritative work. Some mistakes may have been made while writing it. These will be corrected as we learn about them and time permits. Conclusions reached using this program should be validated with other sources.
This program may be copied and shared provided that:
1. It has not been modified in any way.
2. Output from the program may not be published without written permission.
3. No fee is charged above the actual cost of copying and materials.
Calculations for the years 1000AD through 2000AD for the first of Tishri have been validated by comparing them to the Jewish Encyclopedia.
This program displays calendars to the screen and printer for the years 3761BC through 2034AD. The screen display is a mini civil calendar showing the months containing the Holy Days. The Holy Days are also listed along with the day, hour and parts for the Molad Tishri. The Julian civil calendar is used prior to October, 15, 1582. The Gregorian civil calendar is displayed for dated after October 4, 1582.
Three printer displays are provided including the civil calendar with Holy Days, the Hebrew calendar, and a comparison calendar showing a side by side Julian, Gregorian, and Hebrew calendars.
To learn more about the Fixed Calendar (calculated) consult:
1. Jewish Encyclopedia
2. Rabbinical Mathematics and Astronomy
3761BC is the base year for the Hebrew Calendar. We do not attempt to project back further.
2034AD is the end of a 19 year time cycle that is far enough into the future to be useful. We do not attempt to project further as we do not know how, when, or it drift (2hr+ each 19yr cycle) will be corrected.
Prior to 257AD we use the leap year cycle 2, 5, 7, 10, 13, 15, 18.
After 256AD we use the leap year cycle 3, 6, 8, 11, 14, 16, 19.
POSTPONEMENT RULES USED:
1. If the Molad occurs at or after 12 noon, Trumpets is postponed until the following day.
On or after 1443: (Apply only 1 rule)
1. If the Molad is on Sunday, Wednesday, or Friday, Trumpets is postponed
until the following day.
2. If the Molad occurs at or after noon, Trumpets is postponed until the following day. If that causes Trumpets to fall on Sunday, Wednesday, or Friday, Trumpets is postponed an additional day (2 days total).
3. If the Molad of a common (non leap) year is on Tuesday at or after 3 hrs
204 parts, Trumpets is postponed until the following Thursday (2 days
4. If the Molad of a common (non leap) year which immediately follows an
intercalary (leap) year is Monday at or after 9 hours 589 parts, Trumpet is
postponed until the following day.