Recognised as Date
1 January 1443
- Sunday
- Q1
- Common year
- Week 52
- Capricorn
1 January 1443 falls on a Sunday in the proleptic Gregorian calendar, which did not yet exist at the time. It is day 1 of 365 in 1443, falling in week 52 and quarter 1. Its Unix timestamp is -16,630,531,200.
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 year1 of 365
Days remaining in the year364
Days elapsed in the year0
ISO week numberWeek 52 of 1442ISO weeks can belong to the neighbouring year
Week of the month1st
Occurrence in the month1st Sunday
QuarterQ1 1443
Year1443
Days in the month31
Leap yearNo, 365 days
This date in other formats
ISO 86011443-01-01
British (D/M/Y)01/01/1443
American (M/D/Y)01/01/1443
Long formSunday 1st January 1443
RFC 2822Sun, 01 Jan 1443 00:00:00 GMT
Compact14430101
In wordsthe 1st of January, one thousand, four hundred and forty-three
Julian calendar equivalent23 December 1442the date contemporaries would have written, before the Gregorian calendar existed
This date in other calendars
Hebrew20 Tevet 5203the Hebrew calendar has been fully algorithmic since the ninth century, so this is exact
Islamic (tabular)19 Shaban 846 AHthe tabular reckoning; the calendar in religious use begins each month on an actual crescent sighting, so expect a day either way
Persian (arithmetic)11 Dey 821the arithmetic (Birashk) calendar; the official Solar Hijri calendar takes its new year from the astronomical equinox at Tehran
Rata Die526,680days since 1 January 1 CE in the proleptic Gregorian calendar, the pivot every conversion here runs through
Unix time & day counts
Unix timestamp-16,630,531,200seconds since 1 January 1970, midnight UTC
Unix timestamp (ms)-16,630,531,200,000
Relationship to the epoch192,483 days before the Unix epoch
Julian Day Number2,248,105midnight UTC
Days since 1 January 1900-166,916
Days since 1 January 2000-203,440
Relative to today
These values depend on today’s date and change daily.
Today16 September 2026
Days ago213,195 days
In other terms583 years, 254 days and 6 hours
Weeks30456.4 weeks ago
Anniversary this year258 days ago
Years elapsed583 complete years
Seasons & signs
Zodiac signCapricornEarth 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 year26 March 1443
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