Recognised as Date
31 August 1104
- Wednesday
- Q3
- Leap year
- Week 35
- Virgo
31 August 1104 falls on a Wednesday in the proleptic Gregorian calendar, which did not yet exist at the time. It is day 244 of 366 in 1104, a leap year, falling in week 35 and quarter 3. Its Unix timestamp is -27,307,411,200.
Calendar position
Day of the weekWednesdayproleptic Gregorian; contemporaries used the Julian calendar and would have named a different day
Day of the month31st
Day of the year244 of 366
Days remaining in the year122
Days elapsed in the year243
ISO week numberWeek 35ISO 8601, weeks start on Monday
Week of the month5th
Occurrence in the month5th Wednesday, and the last of the month
QuarterQ3 1104
Year1104
Days in the month31
Leap yearYes, 366 days
This date in other formats
ISO 86011104-08-31
British (D/M/Y)31/08/1104
American (M/D/Y)08/31/1104
Long formWednesday 31st August 1104
RFC 2822Wed, 31 Aug 1104 00:00:00 GMT
Compact11040831
In wordsthe 31st of August, one thousand, one hundred and four
Julian calendar equivalent24 August 1104the date contemporaries would have written, before the Gregorian calendar existed
This date in other calendars
Hebrew1 Elul 4864the Hebrew calendar has been fully algorithmic since the ninth century, so this is exact
Islamic (tabular)30 Dhu al-Qidah 497 AHthe tabular reckoning; the calendar in religious use begins each month on an actual crescent sighting, so expect a day either way
Persian (arithmetic)9 Shahrivar 483the arithmetic (Birashk) calendar; the official Solar Hijri calendar takes its new year from the astronomical equinox at Tehran
Rata Die403,105days since 1 January 1 CE in the proleptic Gregorian calendar, the pivot every conversion here runs through
Unix time & day counts
Unix timestamp-27,307,411,200seconds since 1 January 1970, midnight UTC
Unix timestamp (ms)-27,307,411,200,000
Relationship to the epoch316,058 days before the Unix epoch
Julian Day Number2,124,530midnight UTC
Days since 1 January 1900-290,491
Days since 1 January 2000-327,015
Moon phase
PhaseWaxing crescentthe same phase everywhere on Earth at the same instant
Illuminated at 12:00 UTC4%≈to about 1%, by Meeus
Waxing or waningWaxing
Moon age at 12:00 UTC2.1 dayssince the previous new moon
Previous new moon29 August 1104
Next new moon28 September 1104
Previous full moon15 August 1104
Next full moon13 September 1104
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.
Today18 September 2026
Days ago336,772 days
In other terms922 years, 11 days and 12 hours
Weeks48110.3 weeks ago
Anniversary this year18 days ago
Years elapsed922 complete years
Seasons & signs
Zodiac signVirgoEarth sign
Chinese zodiac yearMonkeythe animal changes at Chinese New Year, not 1 January
Season (Northern Hemisphere)Summermeteorological seasons, by whole months
Season (Southern Hemisphere)Winter
Easter Sunday that year24 April 1104
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