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At 23:09:06 UT Saturday 31 March 2018
the moon’s phase will be
is 23.1683333333333 in decimal hours.
The Julian date will be 2458209.4974936.
The sun’s ecliptic longitude will be 11.190187982429 degrees.
Its mean anomaly will be 86.5101487781 degrees.
The moon’s true longitude will be 3076.92944355252 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.)