Recognised as Date
23 January 2001
- Tuesday
- Q1
- Common year
- Week 4
- Aquarius
23 January 2001 falls on a Tuesday. It is day 23 of 365 in 2001, falling in week 4 and quarter 1. Its Unix timestamp is 980,208,000.
Calendar position
Day of the weekTuesday
Day of the month23rd
Day of the year23 of 365
Days remaining in the year342
Days elapsed in the year22
ISO week numberWeek 4ISO 8601, weeks start on Monday
Week of the month4th
Occurrence in the month4th Tuesday
QuarterQ1 2001
Year2001
Days in the month31
Leap yearNo, 365 days
This date in other formats
ISO 86012001-01-23
British (D/M/Y)23/01/2001
American (M/D/Y)01/23/2001
Long formTuesday 23rd January 2001
RFC 2822Tue, 23 Jan 2001 00:00:00 GMT
Compact20010123
In wordsthe 23rd of January, two thousand and one
This date in other calendars
Hebrew28 Tevet 5761the Hebrew calendar has been fully algorithmic since the ninth century, so this is exact
Islamic (tabular)27 Shawwal 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)4 Bahman 1379the arithmetic (Birashk) calendar; the official Solar Hijri calendar takes its new year from the astronomical equinox at Tehran
Rata Die730,508days since 1 January 1 CE in the proleptic Gregorian calendar, the pivot every conversion here runs through
Unix time & day counts
Unix timestamp980,208,000seconds since 1 January 1970, midnight UTC
Unix timestamp (ms)980,208,000,000
Relationship to the epoch11,345 days after the Unix epoch
Julian Day Number2,451,933midnight UTC
Days since 1 January 190036,912
Days since 1 January 2000388
Moon phase
PhaseWaning crescentthe same phase everywhere on Earth at the same instant
Illuminated at 12:00 UTC1%≈to about 1%, by Meeus
Waxing or waningWaning
Moon age at 12:00 UTC28.8 dayssince the previous new moon
Previous new moon25 December 2000, 17:22 UTC
Next new moon24 January 2001, 13:07 UTC
Previous full moon9 January 2001, 20:24 UTC
Next full moon8 February 2001, 07:12 UTC
Relative to today
These values depend on today’s date and change daily.
Today20 September 2026
Days ago9,371 days
In other terms25 years, 239 days and 18 hours
Weeks1338.7 weeks ago
Anniversary this year240 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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