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The HaMaor Mikraos Gedolos chumash has a chart of molad (forecasted first visibility of the new moon in Jerusalem, based on averages observable to the naked eye, assuming Jerusalem local time; am I getting that right?) times in the back, which is great, but it seems like it's off by a day every so often.

For instance, they announced in shul that the Molad for Av, 5770, is Sunday, 6:07 (+ 17/18) PM, and rosh chodesh (the official New Moon day) is Monday. But my chart had it as Monday night, 6:07 +17/18.
(My chart also has a note that they call 6PM-6AM "night.") Is my chart just wrong, or am I reading it incorrectly? This isn't the first time this has happened.

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I wonder if maybe they misinterpreted the source from which they got the times. Suppose that the original said "ליל שני" or the like; that would properly mean "the night leading into Monday" (i.e., Sunday night), but the printers of your chumash may have misunderstood that to mean Monday night.

Out of curiosity, then, can you post several months' worth of molados as given in your chumash? Then we can see whether that might be the case.

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