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The new moon.

At 12:55:23 UT Thursday 26 December 2019
the moon was


Some factors that go into this equation:

Universal Time is 12.9397222222222 in decimal hours.
The Julian date was 2458843.50118558.
The sun’s ecliptic longitude was 274.477237547249 degrees.
Its mean anomaly was 351.9761449378 degrees.
The moon’s mean longitude on 00 January 1990 was 318.351648 degrees.

These calculations incorporate the switch to the English New Style (N.S.)—i.e., Gregorian— calendar after Wednesday, 02 September 1752; the next day became Thursday, 14 September, skipping eleven days. (Please also note that, while fairly accurate, these calculations remain a bit buggy.)

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