Recognised as Date
31 December 2010
- Friday
- Q4
- Common year
- Week 52
- Capricorn
31 December 2010 falls on a Friday. It is day 365 of 365 in 2010, falling in week 52 and quarter 4. Its Unix timestamp is 1,293,753,600.
Calendar position
Day of the weekFriday
Day of the month31st
Day of the year365 of 365
Days remaining in the year0
Days elapsed in the year364
ISO week numberWeek 52ISO 8601, weeks start on Monday
Week of the month5th
Occurrence in the month5th Friday, and the last of the month
QuarterQ4 2010
Year2010
Days in the month31
Leap yearNo, 365 days
This date in other formats
ISO 86012010-12-31
British (D/M/Y)31/12/2010
American (M/D/Y)12/31/2010
Long formFriday 31st December 2010
RFC 2822Fri, 31 Dec 2010 00:00:00 GMT
Compact20101231
In wordsthe 31st of December, two thousand and ten
This date in other calendars
Hebrew24 Tevet 5771the Hebrew calendar has been fully algorithmic since the ninth century, so this is exact
Islamic (tabular)24 Muharram 1432 AHthe tabular reckoning; the calendar in religious use begins each month on an actual crescent sighting, so expect a day either way
Persian (arithmetic)10 Dey 1389the arithmetic (Birashk) calendar; the official Solar Hijri calendar takes its new year from the astronomical equinox at Tehran
Rata Die734,137days since 1 January 1 CE in the proleptic Gregorian calendar, the pivot every conversion here runs through
Unix time & day counts
Unix timestamp1,293,753,600seconds since 1 January 1970, midnight UTC
Unix timestamp (ms)1,293,753,600,000
Relationship to the epoch14,974 days after the Unix epoch
Julian Day Number2,455,562midnight UTC
Days since 1 January 190040,541
Days since 1 January 20004,017
Moon phase
PhaseWaning crescentthe same phase everywhere on Earth at the same instant
Illuminated at 12:00 UTC16%≈to about 1%, by Meeus
Waxing or waningWaning
Moon age at 12:00 UTC25.8 dayssince the previous new moon
Previous new moon5 December 2010, 17:36 UTC
Next new moon4 January 2011, 09:03 UTC
Previous full moon21 December 2010, 08:13 UTC
Next full moon19 January 2011, 21:21 UTC
Lit side, Northern HemisphereLeft
Lit side, Southern HemisphereRightthe 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
Relative to today
These values depend on today’s date and change daily.
Today25 October 2026
Days ago5,777 days
In other terms15 years, 298 days and 6 hours
Weeks825.3 weeks ago
Anniversary this yearin 67 days
Years elapsed15 complete years
Seasons & signs
Zodiac signCapricornEarth sign
Chinese zodiac yearTigerthe animal changes at Chinese New Year, not 1 January
Season (Northern Hemisphere)Wintermeteorological seasons, by whole months
Season (Southern Hemisphere)Summer
Easter Sunday that year4 April 2010
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