Recognised as Date
31 January 2016
- Sunday
- Q1
- Leap year
- Week 4
- Aquarius
31 January 2016 falls on a Sunday. It is day 31 of 366 in 2016, a leap year, falling in week 4 and quarter 1. Its Unix timestamp is 1,454,198,400.
Calendar position
Day of the weekSunday
Day of the month31st
Day of the year31 of 366
Days remaining in the year335
Days elapsed in the year30
ISO week numberWeek 4ISO 8601, weeks start on Monday
Week of the month5th
Occurrence in the month5th Sunday, and the last of the month
QuarterQ1 2016
Year2016
Days in the month31
Leap yearYes, 366 days
This date in other formats
ISO 86012016-01-31
British (D/M/Y)31/01/2016
American (M/D/Y)01/31/2016
Long formSunday 31st January 2016
RFC 2822Sun, 31 Jan 2016 00:00:00 GMT
Compact20160131
In wordsthe 31st of January, two thousand and sixteen
This date in other calendars
Hebrew21 Shevat 5776the Hebrew calendar has been fully algorithmic since the ninth century, so this is exact
Islamic (tabular)20 Rabi II 1437 AHthe tabular reckoning; the calendar in religious use begins each month on an actual crescent sighting, so expect a day either way
Persian (arithmetic)11 Bahman 1394the arithmetic (Birashk) calendar; the official Solar Hijri calendar takes its new year from the astronomical equinox at Tehran
Rata Die735,994days since 1 January 1 CE in the proleptic Gregorian calendar, the pivot every conversion here runs through
Unix time & day counts
Unix timestamp1,454,198,400seconds since 1 January 1970, midnight UTC
Unix timestamp (ms)1,454,198,400,000
Relationship to the epoch16,831 days after the Unix epoch
Julian Day Number2,457,419midnight UTC
Days since 1 January 190042,398
Days since 1 January 20005,874
Moon phase
PhaseWaning gibbousthe same phase everywhere on Earth at the same instant
Illuminated at 12:00 UTC56%≈to about 1%, by Meeus
Waxing or waningWaning
Moon age at 12:00 UTC21.4 dayssince the previous new moon
Previous new moon10 January 2016, 01:30 UTC
Next new moon8 February 2016, 14:39 UTC
Previous full moon24 January 2016, 01:46 UTC
Next full moon22 February 2016, 18:20 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.
Today21 September 2026
Days ago3,886 days
In other terms10 years, 233 days and 12 hours
Weeks555.1 weeks ago
Anniversary this year233 days ago
Years elapsed10 complete years
Seasons & signs
Zodiac signAquariusAir sign
Chinese zodiac yearMonkeythe animal changes at Chinese New Year, not 1 January
Season (Northern Hemisphere)Wintermeteorological seasons, by whole months
Season (Southern Hemisphere)Summer
Easter Sunday that year27 March 2016
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