Recognised as Date
1 June 1440
- Monday
- Q2
- Leap year
- Week 23
- Gemini
1 June 1440 falls on a Monday in the proleptic Gregorian calendar, which did not yet exist at the time. It is day 153 of 366 in 1440, a leap year, falling in week 23 and quarter 2. Its Unix timestamp is -16,712,092,800.
Calendar position
Day of the weekMondayproleptic Gregorian; contemporaries used the Julian calendar and would have named a different day
Day of the month1st
Day of the year153 of 366
Days remaining in the year213
Days elapsed in the year152
ISO week numberWeek 23ISO 8601, weeks start on Monday
Week of the month1st
Occurrence in the month1st Monday
MonthJune (month 6 of 12)
QuarterQ2 1440
Year1440
Days in the month30
Leap yearYes, 366 days
This date in other formats
ISO 86011440-06-01
British (D/M/Y)01/06/1440
American (M/D/Y)06/01/1440
Long formMonday 1st June 1440
RFC 2822Mon, 01 Jun 1440 00:00:00 GMT
Compact14400601
In wordsthe 1st of June, one thousand, four hundred and forty
Julian calendar equivalent23 May 1440the date contemporaries would have written, before the Gregorian calendar existed
This date in other calendars
Hebrew21 Sivan 5200the Hebrew calendar has been fully algorithmic since the ninth century, so this is exact
Islamic (tabular)20 Dhu al-Hijjah 843 AHthe tabular reckoning; the calendar in religious use begins each month on an actual crescent sighting, so expect a day either way
Persian (arithmetic)11 Khordad 819the arithmetic (Birashk) calendar; the official Solar Hijri calendar takes its new year from the astronomical equinox at Tehran
Rata Die525,736days since 1 January 1 CE in the proleptic Gregorian calendar, the pivot every conversion here runs through
Unix time & day counts
Unix timestamp-16,712,092,800seconds since 1 January 1970, midnight UTC
Unix timestamp (ms)-16,712,092,800,000
Relationship to the epoch193,427 days before the Unix epoch
Julian Day Number2,247,161midnight UTC
Days since 1 January 1900-167,860
Days since 1 January 2000-204,384
Moon phase
PhaseWaning gibbousthe same phase everywhere on Earth at the same instant
Illuminated at 12:00 UTC58%≈to about 1%, by Meeus
Waxing or waningWaning
Moon age at 12:00 UTC21.8 dayssince the previous new moon
Previous new moon10 May 1440
Next new moon9 June 1440
Previous full moon26 May 1440
Next full moon24 June 1440
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 ago214,145 days
In other terms586 years, 108 days and 12 hours
Weeks30592.1 weeks ago
Anniversary this year113 days ago
Years elapsed586 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 year29 March 1440
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