Recognised as Date
23 May 1064
- Monday
- Q2
- Leap year
- Week 21
- Gemini
23 May 1064 falls on a Monday in the proleptic Gregorian calendar, which did not yet exist at the time. It is day 144 of 366 in 1064, a leap year, falling in week 21 and quarter 2. Its Unix timestamp is -28,578,268,800.
Calendar position
Day of the weekMondayproleptic Gregorian; contemporaries used the Julian calendar and would have named a different day
Day of the month23rd
Day of the year144 of 366
Days remaining in the year222
Days elapsed in the year143
ISO week numberWeek 21ISO 8601, weeks start on Monday
Week of the month4th
Occurrence in the month4th Monday
MonthMay (month 5 of 12)
QuarterQ2 1064
Year1064
Days in the month31
Leap yearYes, 366 days
This date in other formats
ISO 86011064-05-23
British (D/M/Y)23/05/1064
American (M/D/Y)05/23/1064
Long formMonday 23rd May 1064
RFC 2822Mon, 23 May 1064 00:00:00 GMT
Compact10640523
In wordsthe 23rd of May, one thousand and sixty-four
Julian calendar equivalent17 May 1064the date contemporaries would have written, before the Gregorian calendar existed
This date in other calendars
Hebrew28 Iyyar 4824the Hebrew calendar has been fully algorithmic since the ninth century, so this is exact
Islamic (tabular)27 Jumada I 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)2 Khordad 443the arithmetic (Birashk) calendar; the official Solar Hijri calendar takes its new year from the astronomical equinox at Tehran
Rata Die388,396days since 1 January 1 CE in the proleptic Gregorian calendar, the pivot every conversion here runs through
Unix time & day counts
Unix timestamp-28,578,268,800seconds since 1 January 1970, midnight UTC
Unix timestamp (ms)-28,578,268,800,000
Relationship to the epoch330,767 days before the Unix epoch
Julian Day Number2,109,821midnight UTC
Days since 1 January 1900-305,200
Days since 1 January 2000-341,724
Moon phase
PhaseWaning crescentthe same phase everywhere on Earth at the same instant
Illuminated at 12:00 UTC3%≈to about 1%, by Meeus
Waxing or waningWaning
Moon age at 12:00 UTC28 dayssince the previous new moon
Previous new moon25 April 1064
Next new moon25 May 1064
Previous full moon9 May 1064
Next full moon8 June 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.
Today21 September 2026
Days ago351,484 days
In other terms962 years, 113 days and 12 hours
Weeks50212.0 weeks ago
Anniversary this year121 days ago
Years elapsed962 complete years
Seasons & signs
Zodiac signGeminiAir sign
Chinese zodiac yearDragonthe animal changes at Chinese New Year, not 1 January
Season (Northern Hemisphere)Springmeteorological seasons, by whole months
Season (Southern Hemisphere)Autumn
Easter Sunday that year17 April 1064
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