Recognised as Date
4 December 1990
- Tuesday
- Q4
- Common year
- Week 49
- Sagittarius
4 December 1990 falls on a Tuesday. It is day 338 of 365 in 1990, falling in week 49 and quarter 4. Its Unix timestamp is 660,268,800.
Calendar position
Day of the weekTuesday
Day of the month4th
Day of the year338 of 365
Days remaining in the year27
Days elapsed in the year337
ISO week numberWeek 49ISO 8601, weeks start on Monday
Week of the month1st
Occurrence in the month1st Tuesday
QuarterQ4 1990
Year1990
Days in the month31
Leap yearNo, 365 days
This date in other formats
ISO 86011990-12-04
British (D/M/Y)04/12/1990
American (M/D/Y)12/04/1990
Long formTuesday 4th December 1990
RFC 2822Tue, 04 Dec 1990 00:00:00 GMT
Compact19901204
In wordsthe 4th of December, one thousand, nine hundred and ninety
This date in other calendars
Hebrew17 Kislev 5751the Hebrew calendar has been fully algorithmic since the ninth century, so this is exact
Islamic (tabular)16 Jumada I 1411 AHthe tabular reckoning; the calendar in religious use begins each month on an actual crescent sighting, so expect a day either way
Persian (arithmetic)13 Azar 1369the arithmetic (Birashk) calendar; the official Solar Hijri calendar takes its new year from the astronomical equinox at Tehran
Rata Die726,805days since 1 January 1 CE in the proleptic Gregorian calendar, the pivot every conversion here runs through
Unix time & day counts
Unix timestamp660,268,800seconds since 1 January 1970, midnight UTC
Unix timestamp (ms)660,268,800,000
Relationship to the epoch7,642 days after the Unix epoch
Julian Day Number2,448,230midnight UTC
Days since 1 January 190033,209
Days since 1 January 2000-3,315
Moon phase
PhaseWaning gibbousthe same phase everywhere on Earth at the same instant
Illuminated at 12:00 UTC93%≈to about 1%, by Meeus
Waxing or waningWaning
Moon age at 12:00 UTC17.1 dayssince the previous new moon
Previous new moon17 November 1990, 09:04 UTC
Next new moon17 December 1990, 04:22 UTC
Previous full moon2 December 1990, 07:50 UTC
Next full moon31 December 1990, 18:35 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.
Today20 September 2026
Days ago13,074 days
In other terms35 years, 290 days and 6 hours
Weeks1867.7 weeks ago
Anniversary this yearin 75 days
Years elapsed35 complete years
Seasons & signs
Zodiac signSagittariusFire sign
Chinese zodiac yearHorsethe 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 1990
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