Recognised as Date
21 August 1079
- Thursday
- Q3
- Common year
- Week 34
- Leo
21 August 1079 falls on a Thursday in the proleptic Gregorian calendar, which did not yet exist at the time. It is day 233 of 365 in 1079, falling in week 34 and quarter 3. Its Unix timestamp is -28,097,193,600. A full moon falls on this day.
Calendar position
Day of the weekThursdayproleptic Gregorian; contemporaries used the Julian calendar and would have named a different day
Day of the month21st
Day of the year233 of 365
Days remaining in the year132
Days elapsed in the year232
ISO week numberWeek 34ISO 8601, weeks start on Monday
Week of the month3rd
Occurrence in the month3rd Thursday
QuarterQ3 1079
Year1079
Days in the month31
Leap yearNo, 365 days
This date in other formats
ISO 86011079-08-21
British (D/M/Y)21/08/1079
American (M/D/Y)08/21/1079
Long formThursday 21st August 1079
RFC 2822Thu, 21 Aug 1079 00:00:00 GMT
Compact10790821
In wordsthe 21st of August, one thousand and seventy-nine
Julian calendar equivalent15 August 1079the date contemporaries would have written, before the Gregorian calendar existed
This date in other calendars
Hebrew14 Elul 4839the Hebrew calendar has been fully algorithmic since the ninth century, so this is exact
Islamic (tabular)13 Safar 472 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 Mordad 458the arithmetic (Birashk) calendar; the official Solar Hijri calendar takes its new year from the astronomical equinox at Tehran
Rata Die393,964days since 1 January 1 CE in the proleptic Gregorian calendar, the pivot every conversion here runs through
Unix time & day counts
Unix timestamp-28,097,193,600seconds since 1 January 1970, midnight UTC
Unix timestamp (ms)-28,097,193,600,000
Relationship to the epoch325,199 days before the Unix epoch
Julian Day Number2,115,389midnight UTC
Days since 1 January 1900-299,632
Days since 1 January 2000-336,156
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 UTC15.6 dayssince the previous new moon
Previous new moon5 August 1079
Next new moon4 September 1079
This full moon21 August 1079
Next full moon19 September 1079
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.
Today22 September 2026
Days ago345,917 days
In other terms947 years, 25 days and 6 hours
Weeks49416.7 weeks ago
Anniversary this year32 days ago
Years elapsed947 complete years
Seasons & signs
Zodiac signLeoFire sign
Chinese zodiac yearGoatthe animal changes at Chinese New Year, not 1 January
Season (Northern Hemisphere)Summermeteorological seasons, by whole months
Season (Southern Hemisphere)Winter
Easter Sunday that year30 March 1079
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