Recognised as Date
4 October 1064
- Tuesday
- Q4
- Leap year
- Week 40
- Libra
4 October 1064 falls on a Tuesday in the proleptic Gregorian calendar, which did not yet exist at the time. It is day 278 of 366 in 1064, a leap year, falling in week 40 and quarter 4. Its Unix timestamp is -28,566,691,200. A full moon falls on this day.
Calendar position
Day of the weekTuesdayproleptic Gregorian; contemporaries used the Julian calendar and would have named a different day
Day of the month4th
Day of the year278 of 366
Days remaining in the year88
Days elapsed in the year277
ISO week numberWeek 40ISO 8601, weeks start on Monday
Week of the month1st
Occurrence in the month1st Tuesday
QuarterQ4 1064
Year1064
Days in the month31
Leap yearYes, 366 days
This date in other formats
ISO 86011064-10-04
British (D/M/Y)04/10/1064
American (M/D/Y)10/04/1064
Long formTuesday 4th October 1064
RFC 2822Tue, 04 Oct 1064 00:00:00 GMT
Compact10641004
In wordsthe 4th of October, one thousand and sixty-four
Julian calendar equivalent28 September 1064the date contemporaries would have written, before the Gregorian calendar existed
This date in other calendars
Hebrew15 Tishri 4825the Hebrew calendar has been fully algorithmic since the ninth century, so this is exact
Islamic (tabular)13 Shawwal 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)12 Mehr 443the arithmetic (Birashk) calendar; the official Solar Hijri calendar takes its new year from the astronomical equinox at Tehran
Rata Die388,530days since 1 January 1 CE in the proleptic Gregorian calendar, the pivot every conversion here runs through
Unix time & day counts
Unix timestamp-28,566,691,200seconds since 1 January 1970, midnight UTC
Unix timestamp (ms)-28,566,691,200,000
Relationship to the epoch330,633 days before the Unix epoch
Julian Day Number2,109,955midnight UTC
Days since 1 January 1900-305,066
Days since 1 January 2000-341,590
Moon phase
PhaseFull moonthe instant falls on this UTC day; in time zones far enough east or west the local date is a day either side
Illuminated at 12:00 UTC100%≈to about 1%, by Meeus
Waxing or waningWaning
Moon age at 12:00 UTC14.9 dayssince the previous new moon
Previous new moon19 September 1064
Next new moon19 October 1064
This full moon4 October 1064
Next full moon3 November 1064
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 ago351,384 days
In other terms962 years, 13 days and 12 hours
Weeks50197.7 weeks ago
Anniversary this year21 days ago
Years elapsed962 complete years
Seasons & signs
Zodiac signLibraAir sign
Chinese zodiac yearDragonthe animal changes at Chinese New Year, not 1 January
Season (Northern Hemisphere)Autumnmeteorological seasons, by whole months
Season (Southern Hemisphere)Spring
Easter Sunday that year17 April 1064
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