Recognised as Date
12 June 1380
- Monday
- Q2
- Leap year
- Week 24
- Gemini
12 June 1380 falls on a Monday in the proleptic Gregorian calendar, which did not yet exist at the time. It is day 164 of 366 in 1380, a leap year, falling in week 24 and quarter 2. Its Unix timestamp is -18,604,512,000.
Calendar position
Day of the weekMondayproleptic Gregorian; contemporaries used the Julian calendar and would have named a different day
Day of the month12th
Day of the year164 of 366
Days remaining in the year202
Days elapsed in the year163
ISO week numberWeek 24ISO 8601, weeks start on Monday
Week of the month2nd
Occurrence in the month2nd Monday
MonthJune (month 6 of 12)
QuarterQ2 1380
Year1380
Days in the month30
Leap yearYes, 366 days
This date in other formats
ISO 86011380-06-12
British (D/M/Y)12/06/1380
American (M/D/Y)06/12/1380
Long formMonday 12th June 1380
RFC 2822Mon, 12 Jun 1380 00:00:00 GMT
Compact13800612
In wordsthe 12th of June, one thousand, three hundred and eighty
Julian calendar equivalent4 June 1380the date contemporaries would have written, before the Gregorian calendar existed
This date in other calendars
Hebrew30 Sivan 5140the Hebrew calendar has been fully algorithmic since the ninth century, so this is exact
Islamic (tabular)29 Safar 782 AHthe tabular reckoning; the calendar in religious use begins each month on an actual crescent sighting, so expect a day either way
Persian (arithmetic)23 Khordad 759the arithmetic (Birashk) calendar; the official Solar Hijri calendar takes its new year from the astronomical equinox at Tehran
Rata Die503,833days since 1 January 1 CE in the proleptic Gregorian calendar, the pivot every conversion here runs through
Unix time & day counts
Unix timestamp-18,604,512,000seconds since 1 January 1970, midnight UTC
Unix timestamp (ms)-18,604,512,000,000
Relationship to the epoch215,330 days before the Unix epoch
Julian Day Number2,225,258midnight UTC
Days since 1 January 1900-189,763
Days since 1 January 2000-226,287
Moon phase
PhaseWaxing crescentthe same phase everywhere on Earth at the same instant
Illuminated at 12:00 UTC1%≈to about 1%, by Meeus
Waxing or waningWaxing
Moon age at 12:00 UTC0.8 dayssince the previous new moon
Previous new moon11 June 1380
Next new moon10 July 1380
Previous full moon27 May 1380
Next full moon26 June 1380
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 ago236,044 days
In other terms646 years, 92 days and 12 hours
Weeks33720.6 weeks ago
Anniversary this year98 days ago
Years elapsed646 complete years
Seasons & signs
Zodiac signGeminiAir 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 year2 April 1380
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