Recognised as Date
25 January 1201
- Thursday
- Q1
- Common year
- Week 4
- Aquarius
25 January 1201 falls on a Thursday in the proleptic Gregorian calendar, which did not yet exist at the time. It is day 25 of 365 in 1201, falling in week 4 and quarter 1. Its Unix timestamp is -24,265,180,800.
Calendar position
Day of the weekThursdayproleptic Gregorian; contemporaries used the Julian calendar and would have named a different day
Day of the month25th
Day of the year25 of 365
Days remaining in the year340
Days elapsed in the year24
ISO week numberWeek 4ISO 8601, weeks start on Monday
Week of the month4th
Occurrence in the month4th Thursday, and the last of the month
QuarterQ1 1201
Year1201
Days in the month31
Leap yearNo, 365 days
This date in other formats
ISO 86011201-01-25
British (D/M/Y)25/01/1201
American (M/D/Y)01/25/1201
Long formThursday 25th January 1201
RFC 2822Thu, 25 Jan 1201 00:00:00 GMT
Compact12010125
In wordsthe 25th of January, one thousand, two hundred and one
Julian calendar equivalent18 January 1201the date contemporaries would have written, before the Gregorian calendar existed
This date in other calendars
Hebrew11 Shevat 4961the Hebrew calendar has been fully algorithmic since the ninth century, so this is exact
Islamic (tabular)10 Rabi II 597 AHthe tabular reckoning; the calendar in religious use begins each month on an actual crescent sighting, so expect a day either way
Persian (arithmetic)5 Bahman 579the arithmetic (Birashk) calendar; the official Solar Hijri calendar takes its new year from the astronomical equinox at Tehran
Rata Die438,316days since 1 January 1 CE in the proleptic Gregorian calendar, the pivot every conversion here runs through
Unix time & day counts
Unix timestamp-24,265,180,800seconds since 1 January 1970, midnight UTC
Unix timestamp (ms)-24,265,180,800,000
Relationship to the epoch280,847 days before the Unix epoch
Julian Day Number2,159,741midnight UTC
Days since 1 January 1900-255,280
Days since 1 January 2000-291,804
Moon phase
PhaseWaxing gibbousthe same phase everywhere on Earth at the same instant
Illuminated at 12:00 UTC94%≈to about 1%, by Meeus
Waxing or waningWaxing
Moon age at 12:00 UTC11.9 dayssince the previous new moon
Previous new moon13 January 1201
Next new moon12 February 1201
Previous full moon29 December 1200
Next full moon28 January 1201
Lit side, Northern HemisphereRight
Lit side, Southern HemisphereLeftthe same Moon seen from the other side of the equator; near the equator the lit side points up or down rather than to one side
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.
Today22 September 2026
Days ago301,565 days
In other terms825 years, 233 days and 18 hours
Weeks43080.7 weeks ago
Anniversary this year240 days ago
Years elapsed825 complete years
Seasons & signs
Zodiac signAquariusAir sign
Chinese zodiac yearRoosterthe animal changes at Chinese New Year, not 1 January
Season (Northern Hemisphere)Wintermeteorological seasons, by whole months
Season (Southern Hemisphere)Summer
Easter Sunday that year1 April 1201
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