Recognised as Date
1 January 1252
- Monday
- Q1
- Leap year
- Week 1
- Capricorn
1 January 1252 falls on a Monday in the proleptic Gregorian calendar, which did not yet exist at the time. It was day 1 of 366 in 1252, a leap year, falling in week 1 and quarter 1. Its Unix timestamp is -22,657,881,600.
Calendar position
Day of the weekMondayproleptic Gregorian; contemporaries used the Julian calendar and would have named a different day
Day of the month1st
Day of the year1 of 366
Days remaining in the year365
Days elapsed in the year0
ISO week numberWeek 1ISO 8601, weeks start on Monday
Week of the month1st
Occurrence in the month1st Monday
QuarterQ1 1252
Year1252
Days in the month31
Leap yearYes, 366 days
This date in other formats
ISO 86011252-01-01
British (D/M/Y)01/01/1252
American (M/D/Y)01/01/1252
Long formMonday 1st January 1252
RFC 2822Mon, 01 Jan 1252 00:00:00 GMT
Compact12520101
In wordsthe 1st of January, one thousand, two hundred and fifty-two
Julian calendar equivalent25 December 1251the date contemporaries would have written, before the Gregorian calendar existed
This date in other calendars
Hebrew11 Tevet 5012the Hebrew calendar has been fully algorithmic since the ninth century, so this is exact
Islamic (tabular)9 Shawwal 649 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 630the arithmetic (Birashk) calendar; the official Solar Hijri calendar takes its new year from the astronomical equinox at Tehran
Rata Die456,919days since 1 January 1 CE in the proleptic Gregorian calendar, the pivot every conversion here runs through
Unix time & day counts
Unix timestamp-22,657,881,600seconds since 1 January 1970, midnight UTC
Unix timestamp (ms)-22,657,881,600,000
Relationship to the epoch262,244 days before the Unix epoch
Julian Day Number2,178,344midnight UTC
Days since 1 January 1900-236,677
Days since 1 January 2000-273,201
Relative to today
These values depend on today’s date and change daily.
Today13 September 2026
Days ago282,953 days
In other terms774 years, 249 days and 12 hours
Weeks40421.9 weeks ago
Anniversary this year255 days ago
Years elapsed774 complete years
Seasons & signs
Zodiac signCapricornEarth sign
Chinese zodiac yearRatthe animal changes at Chinese New Year, not 1 January
Season (Northern Hemisphere)Wintermeteorological seasons, by whole months
Season (Southern Hemisphere)Summer
Easter Sunday that year7 April 1252
Keep nerding
Every link below is a page Nerdulator can generate from what it already knows about this value.
Adjacent days
The same day in other years
Nerdulate something else
Nothing in mind? Surprise me · today’s page