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DATE ISOymd = 20150731 = 2015 07 31 on the Gregorian Calendar
= July31, 2015 (Friday)
JD = 2457235 = Standard Calendrical JD number for Gregorian date
Gregorian Calendar Date = Julian Date + 13 days
Note that the corresponding days of the week are the same on both
calendars no matter the number of days difference between them.
© Jay Tanner - PHP Science Labs - 2015 - v1.01