Recognised as Date
1 December 1109
- Wednesday
- Q4
- Common year
- Week 48
- Sagittarius
1 December 1109 falls on a Wednesday in the proleptic Gregorian calendar, which did not yet exist at the time. It is day 335 of 365 in 1109, falling in week 48 and quarter 4. Its Unix timestamp is -27,141,696,000. A new moon falls on this day.
Calendar position
Day of the weekWednesdayproleptic Gregorian; contemporaries used the Julian calendar and would have named a different day
Day of the month1st
Day of the year335 of 365
Days remaining in the year30
Days elapsed in the year334
ISO week numberWeek 48ISO 8601, weeks start on Monday
Week of the month1st
Occurrence in the month1st Wednesday
QuarterQ4 1109
Year1109
Days in the month31
Leap yearNo, 365 days
This date in other formats
ISO 86011109-12-01
British (D/M/Y)01/12/1109
American (M/D/Y)12/01/1109
Long formWednesday 1st December 1109
RFC 2822Wed, 01 Dec 1109 00:00:00 GMT
Compact11091201
In wordsthe 1st of December, one thousand, one hundred and nine
Julian calendar equivalent24 November 1109the date contemporaries would have written, before the Gregorian calendar existed
This date in other calendars
Hebrew29 Kislev 4870the Hebrew calendar has been fully algorithmic since the ninth century, so this is exact
Islamic (tabular)28 Rabi II 503 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 Azar 488the arithmetic (Birashk) calendar; the official Solar Hijri calendar takes its new year from the astronomical equinox at Tehran
Rata Die405,023days since 1 January 1 CE in the proleptic Gregorian calendar, the pivot every conversion here runs through
Unix time & day counts
Unix timestamp-27,141,696,000seconds since 1 January 1970, midnight UTC
Unix timestamp (ms)-27,141,696,000,000
Relationship to the epoch314,140 days before the Unix epoch
Julian Day Number2,126,448midnight UTC
Days since 1 January 1900-288,573
Days since 1 January 2000-325,097
Moon phase
PhaseNew 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 UTC0%≈to about 1%, by Meeus
Waxing or waningWaxing
Moon age at 12:00 UTC0.4 dayssince the previous new moon
This new moon1 December 1109
Next new moon30 December 1109
Previous full moon16 November 1109
Next full moon16 December 1109
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.
Today17 September 2026
Days ago334,853 days
In other terms916 years and 284 days
Weeks47836.1 weeks ago
Anniversary this yearin 75 days
Years elapsed916 complete years
Seasons & signs
Zodiac signSagittariusFire sign
Chinese zodiac yearOxthe animal changes at Chinese New Year, not 1 January
Season (Northern Hemisphere)Wintermeteorological seasons, by whole months
Season (Southern Hemisphere)Summer
Easter Sunday that year28 March 1109
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