Recognised as Date
20 January 1064
- Wednesday
- Q1
- Leap year
- Week 3
- Aquarius
20 January 1064 falls on a Wednesday in the proleptic Gregorian calendar, which did not yet exist at the time. It is day 20 of 366 in 1064, a leap year, falling in week 3 and quarter 1. Its Unix timestamp is -28,588,982,400.
Calendar position
Day of the weekWednesdayproleptic Gregorian; contemporaries used the Julian calendar and would have named a different day
Day of the month20th
Day of the year20 of 366
Days remaining in the year346
Days elapsed in the year19
ISO week numberWeek 3ISO 8601, weeks start on Monday
Week of the month3rd
Occurrence in the month3rd Wednesday
QuarterQ1 1064
Year1064
Days in the month31
Leap yearYes, 366 days
This date in other formats
ISO 86011064-01-20
British (D/M/Y)20/01/1064
American (M/D/Y)01/20/1064
Long formWednesday 20th January 1064
RFC 2822Wed, 20 Jan 1064 00:00:00 GMT
Compact10640120
In wordsthe 20th of January, one thousand and sixty-four
Julian calendar equivalent14 January 1064the date contemporaries would have written, before the Gregorian calendar existed
This date in other calendars
Hebrew23 Shevat 4824the Hebrew calendar has been fully algorithmic since the ninth century, so this is exact
Islamic (tabular)21 Muharram 456 AHthe tabular reckoning; the calendar in religious use begins each month on an actual crescent sighting, so expect a day either way
Persian (arithmetic)30 Dey 442the arithmetic (Birashk) calendar; the official Solar Hijri calendar takes its new year from the astronomical equinox at Tehran
Rata Die388,272days since 1 January 1 CE in the proleptic Gregorian calendar, the pivot every conversion here runs through
Unix time & day counts
Unix timestamp-28,588,982,400seconds since 1 January 1970, midnight UTC
Unix timestamp (ms)-28,588,982,400,000
Relationship to the epoch330,891 days before the Unix epoch
Julian Day Number2,109,697midnight UTC
Days since 1 January 1900-305,324
Days since 1 January 2000-341,848
Moon phase
PhaseWaning crescentthe same phase everywhere on Earth at the same instant
Illuminated at 12:00 UTC42%≈to about 1%, by Meeus
Waxing or waningWaning
Moon age at 12:00 UTC22.9 dayssince the previous new moon
Previous new moon28 December 1063
Next new moon27 January 1064
Previous full moon13 January 1064
Next full moon11 February 1064
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
PrecisionDates onlybefore 1700 or after 2150 the Earth's rotation is not known well enough to give a time, and a phase near midnight can land a day either side
Relative to today
These values depend on today’s date and change daily.
Today25 October 2026
Days ago351,642 days
In other terms962 years, 271 days and 12 hours
Weeks50234.6 weeks ago
Anniversary this year278 days ago
Years elapsed962 complete years
Seasons & signs
Zodiac signAquariusAir sign
Chinese zodiac yearDragonthe animal changes at Chinese New Year, not 1 January
Season (Northern Hemisphere)Wintermeteorological seasons, by whole months
Season (Southern Hemisphere)Summer
Easter Sunday that year17 April 1064
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