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The new moon.

At 12:13:35 UT Wednesday 20 September 2017
the moon’s phase was

NEW

Time Zone:   

Some factors that go into this equation:

Universal Time is 12.2430555555556 in decimal hours.
The Julian date was 2458016.50100956.
The sun’s ecliptic longitude was 177.720893212311 degrees.
Its mean anomaly was 256.81717005359 degrees.
The moon’s true longitude was 541.362488141252 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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