Recognised as Date
1 December 1149
- Thursday
- Q4
- Common year
- Week 48
- Sagittarius
1 December 1149 falls on a Thursday in the proleptic Gregorian calendar, which did not yet exist at the time. It is day 335 of 365 in 1149, falling in week 48 and quarter 4. Its Unix timestamp is -25,879,392,000.
Calendar position
Day of the weekThursdayproleptic 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 Thursday
QuarterQ4 1149
Year1149
Days in the month31
Leap yearNo, 365 days
This date in other formats
ISO 86011149-12-01
British (D/M/Y)01/12/1149
American (M/D/Y)12/01/1149
Long formThursday 1st December 1149
RFC 2822Thu, 01 Dec 1149 00:00:00 GMT
Compact11491201
In wordsthe 1st of December, one thousand, one hundred and forty-nine
Julian calendar equivalent24 November 1149the date contemporaries would have written, before the Gregorian calendar existed
This date in other calendars
Hebrew22 Kislev 4910the Hebrew calendar has been fully algorithmic since the ninth century, so this is exact
Islamic (tabular)21 Rajab 544 AHthe tabular reckoning; the calendar in religious use begins each month on an actual crescent sighting, so expect a day either way
Persian (arithmetic)10 Azar 528the arithmetic (Birashk) calendar; the official Solar Hijri calendar takes its new year from the astronomical equinox at Tehran
Rata Die419,633days since 1 January 1 CE in the proleptic Gregorian calendar, the pivot every conversion here runs through
Unix time & day counts
Unix timestamp-25,879,392,000seconds since 1 January 1970, midnight UTC
Unix timestamp (ms)-25,879,392,000,000
Relationship to the epoch299,530 days before the Unix epoch
Julian Day Number2,141,058midnight UTC
Days since 1 January 1900-273,963
Days since 1 January 2000-310,487
Moon phase
PhaseWaning crescentthe same phase everywhere on Earth at the same instant
Illuminated at 12:00 UTC44%≈to about 1%, by Meeus
Waxing or waningWaning
Moon age at 12:00 UTC22.2 dayssince the previous new moon
Previous new moon9 November 1149
Next new moon9 December 1149
Previous full moon24 November 1149
Next full moon23 December 1149
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.
Today22 September 2026
Days ago320,248 days
In other terms876 years and 289 days
Weeks45749.7 weeks ago
Anniversary this yearin 70 days
Years elapsed876 complete years
Seasons & signs
Zodiac signSagittariusFire sign
Chinese zodiac yearSnakethe animal changes at Chinese New Year, not 1 January
Season (Northern Hemisphere)Wintermeteorological seasons, by whole months
Season (Southern Hemisphere)Summer
Easter Sunday that year3 April 1149
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