Astronomy and calendars
English Perpetual calendar May 2023
Deutsch Espanol Italiano day calendar - Calendar 2023

(for BC Years use astronomical notation)

May 2023
1234Fase Luna56
7891011Fase Luna1213
1415161718Fase Luna1920
212223242526Fase Luna27
Gregorian Calendar
Events of the month
Astronomical events
IconaDescrizioneDataOra T.U.
Full MoonFull MoonFriday 5 17:34
Friday 5 17:22
Last quarterLast quarterFriday 12 14:31
New MoonNew MoonFriday 19 15:53
First QuarterFirst QuarterSaturday 27 15:15
Christian Calendar
Event Day
PentecostSunday 28
Times are in UT - Universal Time (Greenwich Mean Time); for lunar phases and eclipses the error in within 2 min.

This perpetual calendar works for any year since 4713AC (-4712). The date of change from Julian Calendar to Gregorian is Oct 15 1582 (Julian Oct 5 1582).
For years before 321, when Emperor Constantine I introduced by decree the week cycle and Sunday rest, you will see the Roman Calendar with Kalendae, Nonae and Idi and the nundinal cycle instead of the week. You can always see the modern style calendar selecting from the dropdown menu.
For years between 46BC (first year of the Julian Calendar) and 4AD I tried to take into account the leap year error (which the priests interposed every three years instead of four) up to 8BC when August corrected this error suppressing three leap years.
For years before 46AC (-45) this calendar uses a analeptic julian calendar which obviously is different from the calendar used by Romans at the time (Numan Calendar).


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