Recognised as Date
1 December 1438
- Saturday
- Q4
- Common year
- Week 48
- Sagittarius
1 December 1438 falls on a Saturday in the proleptic Gregorian calendar, which did not yet exist at the time. It was day 335 of 365 in 1438, falling in week 48 and quarter 4. Its Unix timestamp is -16,759,440,000.
Calendar position
Day of the weekSaturdayproleptic 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 Saturday
QuarterQ4 1438
Year1438
Days in the month31
Leap yearNo, 365 days
This date in other formats
ISO 86011438-12-01
British (D/M/Y)01/12/1438
American (M/D/Y)12/01/1438
Long formSaturday 1st December 1438
RFC 2822Sat, 01 Dec 1438 00:00:00 GMT
Compact14381201
In wordsthe 1st of December, one thousand, four hundred and thirty-eight
Julian calendar equivalent22 November 1438the date contemporaries would have written, before the Gregorian calendar existed
This date in other calendars
Hebrew4 Kislev 5199the Hebrew calendar has been fully algorithmic since the ninth century, so this is exact
Islamic (tabular)4 Jumada II 842 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 817the arithmetic (Birashk) calendar; the official Solar Hijri calendar takes its new year from the astronomical equinox at Tehran
Rata Die525,188days since 1 January 1 CE in the proleptic Gregorian calendar, the pivot every conversion here runs through
Unix time & day counts
Unix timestamp-16,759,440,000seconds since 1 January 1970, midnight UTC
Unix timestamp (ms)-16,759,440,000,000
Relationship to the epoch193,975 days before the Unix epoch
Julian Day Number2,246,613midnight UTC
Days since 1 January 1900-168,408
Days since 1 January 2000-204,932
Relative to today
These values depend on today’s date and change daily.
Today14 September 2026
Days ago214,685 days
In other terms587 years, 283 days and 6 hours
Weeks30669.3 weeks ago
Anniversary this yearin 78 days
Years elapsed587 complete years
Seasons & signs
Zodiac signSagittariusFire sign
Chinese zodiac yearHorsethe animal changes at Chinese New Year, not 1 January
Season (Northern Hemisphere)Wintermeteorological seasons, by whole months
Season (Southern Hemisphere)Summer
Easter Sunday that year22 April 1438
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