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... KL for 3-day people began on Motza"Sh; for 7-day people on Tuesday night, Nov. 24. Last op (for either minhag) is all night between Tuesday Dec. 1 and Wed. the 2nd.Cal-check: There are 385 different Hebrew dates on the calendar. 353 of them occur every year. The other 32 dates occur in some years and not in others. These 32 dates are 30 Marcheshvan, 30 Kislev, and 1-30 of the first Adar. Stats on this some other time. But here's this: Whereas most dates on the calendar have four days of the week (D/W) on which they fall and 3 D/W on which they cannot fall (starting point for that is LO ADU ROSH), the first 29 days of Kislev can each occur on 6 different D/W and have only one D/W they cannot fall on. For example, this Shabbat is 11 Kislev. Besides Shabbat, this date can be a Sunday, Monday, Wednesday, Thursday, or Friday - but never a Tuesday. 30 Kislev cannot fall on SUN, WED, or FRI, but is not linked to LO ADU ROSH. [The Parshat Vayeitzei Homepage]
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