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The waxing moon.

At 00:32:54 UT Saturday 18 May 2019
the waxing moon’s phase was

99.07% full

Time Zone:   

Some factors that go into this equation:

Universal Time is 0.565000000000001 in decimal hours.
The Julian date was 2458622.49067052.
The sun’s ecliptic longitude was 56.831163519686 degrees.
Its mean anomaly was 132.6542188098 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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