Recognised as Date
15 December 2011
- Thursday
- Q4
- Common year
- Week 50
- Sagittarius
15 December 2011 falls on a Thursday. It is day 349 of 365 in 2011, falling in week 50 and quarter 4. Its Unix timestamp is 1,323,907,200.
Calendar position
Day of the weekThursday
Day of the month15th
Day of the year349 of 365
Days remaining in the year16
Days elapsed in the year348
ISO week numberWeek 50ISO 8601, weeks start on Monday
Week of the month3rd
Occurrence in the month3rd Thursday
QuarterQ4 2011
Year2011
Days in the month31
Leap yearNo, 365 days
This date in other formats
ISO 86012011-12-15
British (D/M/Y)15/12/2011
American (M/D/Y)12/15/2011
Long formThursday 15th December 2011
RFC 2822Thu, 15 Dec 2011 00:00:00 GMT
Compact20111215
In wordsthe 15th of December, two thousand and eleven
This date in other calendars
Hebrew19 Kislev 5772the Hebrew calendar has been fully algorithmic since the ninth century, so this is exact
Islamic (tabular)19 Muharram 1433 AHthe tabular reckoning; the calendar in religious use begins each month on an actual crescent sighting, so expect a day either way
Persian (arithmetic)24 Azar 1390the arithmetic (Birashk) calendar; the official Solar Hijri calendar takes its new year from the astronomical equinox at Tehran
Rata Die734,486days since 1 January 1 CE in the proleptic Gregorian calendar, the pivot every conversion here runs through
Unix time & day counts
Unix timestamp1,323,907,200seconds since 1 January 1970, midnight UTC
Unix timestamp (ms)1,323,907,200,000
Relationship to the epoch15,323 days after the Unix epoch
Julian Day Number2,455,911midnight UTC
Days since 1 January 190040,890
Days since 1 January 20004,366
Moon phase
PhaseWaning gibbousthe same phase everywhere on Earth at the same instant
Illuminated at 12:00 UTC77%≈to about 1%, by Meeus
Waxing or waningWaning
Moon age at 12:00 UTC20.2 dayssince the previous new moon
Previous new moon25 November 2011, 06:10 UTC
Next new moon24 December 2011, 18:06 UTC
Previous full moon10 December 2011, 14:36 UTC
Next full moon9 January 2012, 07:30 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.
Today18 September 2026
Days ago5,391 days
In other terms14 years, 277 days and 12 hours
Weeks770.1 weeks ago
Anniversary this yearin 88 days
Years elapsed14 complete years
Seasons & signs
Zodiac signSagittariusFire sign
Chinese zodiac yearRabbitthe animal changes at Chinese New Year, not 1 January
Season (Northern Hemisphere)Wintermeteorological seasons, by whole months
Season (Southern Hemisphere)Summer
Easter Sunday that year24 April 2011
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