Recognised as Date
23 August 1378
- Sunday
- Q3
- Common year
- Week 34
- Virgo
23 August 1378 falls on a Sunday in the proleptic Gregorian calendar, which did not yet exist at the time. It is day 235 of 365 in 1378, falling in week 34 and quarter 3. Its Unix timestamp is -18,661,449,600. A last quarter falls on this day.
Calendar position
Day of the weekSundayproleptic Gregorian; contemporaries used the Julian calendar and would have named a different day
Day of the month23rd
Day of the year235 of 365
Days remaining in the year130
Days elapsed in the year234
ISO week numberWeek 34ISO 8601, weeks start on Monday
Week of the month4th
Occurrence in the month4th Sunday
QuarterQ3 1378
Year1378
Days in the month31
Leap yearNo, 365 days
This date in other formats
ISO 86011378-08-23
British (D/M/Y)23/08/1378
American (M/D/Y)08/23/1378
Long formSunday 23rd August 1378
RFC 2822Sun, 23 Aug 1378 00:00:00 GMT
Compact13780823
In wordsthe 23rd of August, one thousand, three hundred and seventy-eight
Julian calendar equivalent15 August 1378the date contemporaries would have written, before the Gregorian calendar existed
This date in other calendars
Hebrew21 Av 5138the Hebrew calendar has been fully algorithmic since the ninth century, so this is exact
Islamic (tabular)19 Rabi II 780 AHthe tabular reckoning; the calendar in religious use begins each month on an actual crescent sighting, so expect a day either way
Persian (arithmetic)1 Shahrivar 757the arithmetic (Birashk) calendar; the official Solar Hijri calendar takes its new year from the astronomical equinox at Tehran
Rata Die503,174days since 1 January 1 CE in the proleptic Gregorian calendar, the pivot every conversion here runs through
Unix time & day counts
Unix timestamp-18,661,449,600seconds since 1 January 1970, midnight UTC
Unix timestamp (ms)-18,661,449,600,000
Relationship to the epoch215,989 days before the Unix epoch
Julian Day Number2,224,599midnight UTC
Days since 1 January 1900-190,422
Days since 1 January 2000-226,946
Moon phase
PhaseLast quarterthe 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 UTC55%≈to about 1%, by Meeus
Waxing or waningWaning
Moon age at 12:00 UTC21.4 dayssince the previous new moon
Previous new moon2 August 1378
Next new moon31 August 1378
Previous full moon17 August 1378
Next full moon15 September 1378
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.
Today19 September 2026
Days ago236,704 days
In other terms648 years and 22 days
Weeks33814.9 weeks ago
Anniversary this year27 days ago
Years elapsed648 complete years
Seasons & signs
Zodiac signVirgoEarth sign
Chinese zodiac yearHorsethe animal changes at Chinese New Year, not 1 January
Season (Northern Hemisphere)Summermeteorological seasons, by whole months
Season (Southern Hemisphere)Winter
Easter Sunday that year29 March 1378
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