Recognised as Date
31 July 1200
- Monday
- Q3
- Leap year
- Week 31
- Leo
31 July 1200 falls on a Monday in the proleptic Gregorian calendar, which did not yet exist at the time. It is day 213 of 366 in 1200, a leap year, falling in week 31 and quarter 3. Its Unix timestamp is -24,280,560,000.
Calendar position
Day of the weekMondayproleptic Gregorian; contemporaries used the Julian calendar and would have named a different day
Day of the month31st
Day of the year213 of 366
Days remaining in the year153
Days elapsed in the year212
ISO week numberWeek 31ISO 8601, weeks start on Monday
Week of the month5th
Occurrence in the month5th Monday, and the last of the month
MonthJuly (month 7 of 12)
QuarterQ3 1200
Year1200
Days in the month31
Leap yearYes, 366 days
This date in other formats
ISO 86011200-07-31
British (D/M/Y)31/07/1200
American (M/D/Y)07/31/1200
Long formMonday 31st July 1200
RFC 2822Mon, 31 Jul 1200 00:00:00 GMT
Compact12000731
In wordsthe 31st of July, one thousand, two hundred
Julian calendar equivalent24 July 1200the date contemporaries would have written, before the Gregorian calendar existed
This date in other calendars
Hebrew11 Av 4960the Hebrew calendar has been fully algorithmic since the ninth century, so this is exact
Islamic (tabular)10 Shawwal 596 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 Mordad 579the arithmetic (Birashk) calendar; the official Solar Hijri calendar takes its new year from the astronomical equinox at Tehran
Rata Die438,138days since 1 January 1 CE in the proleptic Gregorian calendar, the pivot every conversion here runs through
Unix time & day counts
Unix timestamp-24,280,560,000seconds since 1 January 1970, midnight UTC
Unix timestamp (ms)-24,280,560,000,000
Relationship to the epoch281,025 days before the Unix epoch
Julian Day Number2,159,563midnight UTC
Days since 1 January 1900-255,458
Days since 1 January 2000-291,982
Moon phase
PhaseWaxing gibbousthe same phase everywhere on Earth at the same instant
Illuminated at 12:00 UTC85%≈to about 1%, by Meeus
Waxing or waningWaxing
Moon age at 12:00 UTC11.6 dayssince the previous new moon
Previous new moon19 July 1200
Next new moon18 August 1200
Previous full moon5 July 1200
Next full moon3 August 1200
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.
Today22 September 2026
Days ago301,743 days
In other terms826 years, 46 days and 12 hours
Weeks43106.1 weeks ago
Anniversary this year53 days ago
Years elapsed826 complete years
Seasons & signs
Zodiac signLeoFire 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 year9 April 1200
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