Recognised as Date
30 September 1104
- Friday
- Q3
- Leap year
- Week 39
- Libra
30 September 1104 falls on a Friday in the proleptic Gregorian calendar, which did not yet exist at the time. It is day 274 of 366 in 1104, a leap year, falling in week 39 and quarter 3. Its Unix timestamp is -27,304,819,200.
Calendar position
Day of the weekFridayproleptic Gregorian; contemporaries used the Julian calendar and would have named a different day
Day of the month30th
Day of the year274 of 366
Days remaining in the year92
Days elapsed in the year273
ISO week numberWeek 39ISO 8601, weeks start on Monday
Week of the month5th
Occurrence in the month5th Friday, and the last of the month
QuarterQ3 1104
Year1104
Days in the month30
Leap yearYes, 366 days
This date in other formats
ISO 86011104-09-30
British (D/M/Y)30/09/1104
American (M/D/Y)09/30/1104
Long formFriday 30th September 1104
RFC 2822Fri, 30 Sep 1104 00:00:00 GMT
Compact11040930
In wordsthe 30th of September, one thousand, one hundred and four
Julian calendar equivalent23 September 1104the date contemporaries would have written, before the Gregorian calendar existed
This date in other calendars
Hebrew2 Tishri 4865the Hebrew calendar has been fully algorithmic since the ninth century, so this is exact
Islamic (tabular)1 Muharram 498 AHthe tabular reckoning; the calendar in religious use begins each month on an actual crescent sighting, so expect a day either way
Persian (arithmetic)8 Mehr 483the arithmetic (Birashk) calendar; the official Solar Hijri calendar takes its new year from the astronomical equinox at Tehran
Rata Die403,135days since 1 January 1 CE in the proleptic Gregorian calendar, the pivot every conversion here runs through
Unix time & day counts
Unix timestamp-27,304,819,200seconds since 1 January 1970, midnight UTC
Unix timestamp (ms)-27,304,819,200,000
Relationship to the epoch316,028 days before the Unix epoch
Julian Day Number2,124,560midnight UTC
Days since 1 January 1900-290,461
Days since 1 January 2000-326,985
Moon phase
PhaseWaxing crescentthe same phase everywhere on Earth at the same instant
Illuminated at 12:00 UTC5%≈to about 1%, by Meeus
Waxing or waningWaxing
Moon age at 12:00 UTC2.4 dayssince the previous new moon
Previous new moon28 September 1104
Next new moon27 October 1104
Previous full moon13 September 1104
Next full moon12 October 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 ago336,742 days
In other terms921 years, 346 days and 18 hours
Weeks48106.0 weeks ago
Anniversary this yearin 12 days
Years elapsed921 complete years
Seasons & signs
Zodiac signLibraAir sign
Chinese zodiac yearMonkeythe animal changes at Chinese New Year, not 1 January
Season (Northern Hemisphere)Autumnmeteorological seasons, by whole months
Season (Southern Hemisphere)Spring
Easter Sunday that year24 April 1104
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