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The new moon.

At 01:01:33 UT Sunday 08 August 2021
the moon was

NEW


Some factors that go into this equation:

Universal Time is 1.0425 in decimal hours.
The Julian date was 2459434.50306337.
The sun’s ecliptic longitude was 135.702460844826 degrees.
Its mean anomaly was 214.0051298276 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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