Recognised as Date
1 December 1371
- Sunday
- Q4
- Common year
- Week 48
- Sagittarius
1 December 1371 falls on a Sunday in the proleptic Gregorian calendar, which did not yet exist at the time. It is day 335 of 365 in 1371, falling in week 48 and quarter 4. Its Unix timestamp is -18,873,734,400. A full moon falls on this day.
Calendar position
Day of the weekSundayproleptic Gregorian; contemporaries used the Julian calendar and would have named a different day
Day of the month1st
Day of the year335 of 365
Days remaining in the year30
Days elapsed in the year334
ISO week numberWeek 48ISO 8601, weeks start on Monday
Week of the month1st
Occurrence in the month1st Sunday
QuarterQ4 1371
Year1371
Days in the month31
Leap yearNo, 365 days
This date in other formats
ISO 86011371-12-01
British (D/M/Y)01/12/1371
American (M/D/Y)12/01/1371
Long formSunday 1st December 1371
RFC 2822Sun, 01 Dec 1371 00:00:00 GMT
Compact13711201
In wordsthe 1st of December, one thousand, three hundred and seventy-one
Julian calendar equivalent23 November 1371the date contemporaries would have written, before the Gregorian calendar existed
This date in other calendars
Hebrew15 Kislev 5132the Hebrew calendar has been fully algorithmic since the ninth century, so this is exact
Islamic (tabular)14 Jumada I 773 AHthe tabular reckoning; the calendar in religious use begins each month on an actual crescent sighting, so expect a day either way
Persian (arithmetic)10 Azar 750the arithmetic (Birashk) calendar; the official Solar Hijri calendar takes its new year from the astronomical equinox at Tehran
Rata Die500,717days since 1 January 1 CE in the proleptic Gregorian calendar, the pivot every conversion here runs through
Unix time & day counts
Unix timestamp-18,873,734,400seconds since 1 January 1970, midnight UTC
Unix timestamp (ms)-18,873,734,400,000
Relationship to the epoch218,446 days before the Unix epoch
Julian Day Number2,222,142midnight UTC
Days since 1 January 1900-192,879
Days since 1 January 2000-229,403
Moon phase
PhaseFull moonthe instant falls on this UTC day; in time zones far enough east or west the local date is a day either side
Illuminated at 12:00 UTC100%≈to about 1%, by Meeus
Waxing or waningWaning
Moon age at 12:00 UTC15.4 dayssince the previous new moon
Previous new moon16 November 1371
Next new moon15 December 1371
This full moon1 December 1371
Next full moon30 December 1371
PrecisionDates onlybefore 1700 or after 2150 the Earth's rotation is not known well enough to give a time, and a phase near midnight can land a day either side
Relative to today
These values depend on today’s date and change daily.
Today18 September 2026
Days ago239,160 days
In other terms654 years, 286 days and 12 hours
Weeks34165.7 weeks ago
Anniversary this yearin 74 days
Years elapsed654 complete years
Seasons & signs
Zodiac signSagittariusFire sign
Chinese zodiac yearPigthe animal changes at Chinese New Year, not 1 January
Season (Northern Hemisphere)Wintermeteorological seasons, by whole months
Season (Southern Hemisphere)Summer
Easter Sunday that year14 April 1371
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