Recognised as Date
4 January 1064
- Monday
- Q1
- Leap year
- Week 1
- Capricorn
4 January 1064 falls on a Monday in the proleptic Gregorian calendar, which did not yet exist at the time. It is day 4 of 366 in 1064, a leap year, falling in week 1 and quarter 1. Its Unix timestamp is -28,590,364,800.
Calendar position
Day of the weekMondayproleptic Gregorian; contemporaries used the Julian calendar and would have named a different day
Day of the month4th
Day of the year4 of 366
Days remaining in the year362
Days elapsed in the year3
ISO week numberWeek 1ISO 8601, weeks start on Monday
Week of the month1st
Occurrence in the month1st Monday
QuarterQ1 1064
Year1064
Days in the month31
Leap yearYes, 366 days
This date in other formats
ISO 86011064-01-04
British (D/M/Y)04/01/1064
American (M/D/Y)01/04/1064
Long formMonday 4th January 1064
RFC 2822Mon, 04 Jan 1064 00:00:00 GMT
Compact10640104
In wordsthe 4th of January, one thousand and sixty-four
Julian calendar equivalent29 December 1063the date contemporaries would have written, before the Gregorian calendar existed
This date in other calendars
Hebrew7 Shevat 4824the Hebrew calendar has been fully algorithmic since the ninth century, so this is exact
Islamic (tabular)5 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)14 Dey 442the arithmetic (Birashk) calendar; the official Solar Hijri calendar takes its new year from the astronomical equinox at Tehran
Rata Die388,256days since 1 January 1 CE in the proleptic Gregorian calendar, the pivot every conversion here runs through
Unix time & day counts
Unix timestamp-28,590,364,800seconds since 1 January 1970, midnight UTC
Unix timestamp (ms)-28,590,364,800,000
Relationship to the epoch330,907 days before the Unix epoch
Julian Day Number2,109,681midnight UTC
Days since 1 January 1900-305,340
Days since 1 January 2000-341,864
Moon phase
PhaseWaxing crescentthe same phase everywhere on Earth at the same instant
Illuminated at 12:00 UTC38%≈to about 1%, by Meeus
Waxing or waningWaxing
Moon age at 12:00 UTC6.9 dayssince the previous new moon
Previous new moon28 December 1063
Next new moon27 January 1064
Previous full moon14 December 1063
Next full moon13 January 1064
Lit side, Northern HemisphereRight
Lit side, Southern HemisphereLeftthe 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.
Today26 October 2026
Days ago351,659 days
In other terms962 years, 288 days and 12 hours
Weeks50237.0 weeks ago
Anniversary this year295 days ago
Years elapsed962 complete years
Seasons & signs
Zodiac signCapricornEarth 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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