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The full moon.

At 17:57:41 UT Saturday 18 May 2019
the moon’s phase was

FULL

Time Zone:   

Some factors that go into this equation:

Universal Time is 17.9780555555556 in decimal hours.
The Julian date was 2458622.49975581.
The sun’s ecliptic longitude was 57.529988080598 degrees.
Its mean anomaly was 133.369349317 degrees.
The moon’s mean longitude 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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