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...
As mentioned last week, the last opportunity to say Kiddush L'vana this month is Sunday evening, Dec. 26, up to 9:29pm. This time is dependent on locale and needs to be adjusted. For example, in New York the last op for KL is 2:29pm on Sunday, which means, of course, that the real last op for KL is all night Motza'ei Shabbat.
Also remember that during the winter months, and depending upon where you live, there can be cloudy conditions which will sometimes prevent you from saying KL. If this happens on a Motza'ei Shabbat, when most people are tuned in to KL, then they might forget to check on the following nights for a visible moon and might miss KL altogether for the month. It would be sad to miss out on this monthly "reception" of the Divine Presence.