Astronomy and calendars
English Perpetual calendar July 2018
Deutsch Espanol Italiano day calendar - Calendar 2018



(for BC Years use astronomical notation)

July 2018
SunMonTueWedThuFriSat
12345Fase Luna67
89101112Fase Luna1314
15161718Fase Luna192021
2223242526Fase Luna2728
293031
Gregorian Calendar
Events of the month
Astronomical events
EventDescriptionDayUT
IconaDescrizioneDataOra T.U.
Last quarterLast quarterFriday 6 07:56
New MoonNew MoonFriday 13 02:47
Partial Solar Eclipse<br>(Antarctic region)Partial Solar Eclipse
(Antarctic region)
Friday 13 03:02
First QuarterFirst QuarterThursday 19 19:44
Full MoonFull MoonFriday 27 20:19
Total Lunar EclipseTotal Lunar EclipseFriday 27 20:20
Christian Calendar
Event Day
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).


Reference

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