WORD OF THE MONTH

A weekly feature of Torah Tidbits to help clarify practical and conceptual aspects of the Jewish Calendar, thereby better fulfilling the mitzva of HaChodesh HaZeh Lachem...

We bench Rosh Chodesh Tevet on Shabbat Parshat Vayeishev, December 8th, '01

ROSH CHODESH TEVET Y'H'YEH B'YOM SHABBAT KODESH U'L'MOCHRATO B'YOM RISHON HABA ALEINU V'AL KOL YISRA'EL L'TOVA

The Molad is on Shabbat (Dec 15th) 12h 18m 1p
In Rambam notation: SHABBAT • 18h • 325 chalakim 
Clock time (can be adjusted for location) SHABBAT DEC. 15, 11:57Ľam
Astronomical Molad - FRI DEC.14, 22:50:17
Technically, we say U'L'MACHARATO only when Rosh Chodesh will be on the following Shabbat and the Sunday that follows it (as opposed to the Sunday that is tomorrow). Otherwise, it is unnecessary.