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The waning moon.

At 01:45:11 UT Saturday 25 March 2017
the waning moon’s phase is

11.34% full

Time Zone:   

Some factors that go into this equation:

Universal Time is 1.76972222222222 in decimal hours.
The Julian date is 2457837.61340247.
The sun’s ecliptic longitude is 4.61040772396302 degrees.
Its mean anomaly is 79.95616770572 degrees.
The moon’s true longitude is 325.252078900627 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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