Date
31 January 2001
- Wednesday
- Q1
- Common year
- Week 5
- Aquarius
31 January 2001 was a Wednesday. It was day 31 of 365 in 2001, falling in week 5 and quarter 1. Its Unix timestamp is 980,899,200.
Calendar position
Day of the weekWednesday
Day of the month31st
Day of the year31 of 365
Days remaining in the year334
Days elapsed in the year30
ISO week numberWeek 5ISO 8601, weeks start on Monday
Week of the month5th
Occurrence in the month5th Wednesday, and the last of the month
QuarterQ1 2001
Year2001
Days in the month31
Leap yearNo, 365 days
This date in other formats
ISO 86012001-01-31
British (D/M/Y)31/01/2001
American (M/D/Y)01/31/2001
Long formWednesday 31st January 2001
RFC 2822Wed, 31 Jan 2001 00:00:00 GMT
Compact20010131
In wordsthe 31st of January, two thousand and one
This date in other calendars
Hebrew7 Shevat 5761the Hebrew calendar has been fully algorithmic since the ninth century, so this is exact
Islamic (tabular)6 Dhu al-Qidah 1421 AHthe tabular reckoning; the calendar in religious use begins each month on an actual crescent sighting, so expect a day either way
Persian (arithmetic)12 Bahman 1379the arithmetic (Birashk) calendar; the official Solar Hijri calendar takes its new year from the astronomical equinox at Tehran
Rata Die730,516days since 1 January 1 CE in the proleptic Gregorian calendar, the pivot every conversion here runs through
Unix time & day counts
Unix timestamp980,899,200seconds since 1 January 1970, midnight UTC
Unix timestamp (ms)980,899,200,000
Relationship to the epoch11,353 days after the Unix epoch
Julian Day Number2,451,941midnight UTC
Days since 1 January 190036,920
Days since 1 January 2000396
Relative to today
These values depend on today’s date and change daily.
Today10 September 2026
Days ago9,353 days
In other terms25 years, 221 days and 18 hours
Weeks1336.1 weeks ago
Anniversary this year222 days ago
Years elapsed25 complete years
Seasons & signs
Zodiac signAquariusAir sign
Chinese zodiac yearSnakethe animal changes at Chinese New Year, not 1 January
Season (Northern Hemisphere)Wintermeteorological seasons, by whole months
Season (Southern Hemisphere)Summer
Easter Sunday that year15 April 2001
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