Recognised as Date
1 May 1378
- Friday
- Q2
- Common year
- Week 18
- Taurus
1 May 1378 falls on a Friday in the proleptic Gregorian calendar, which did not yet exist at the time. It is day 121 of 365 in 1378, falling in week 18 and quarter 2. Its Unix timestamp is -18,671,299,200.
Calendar position
Day of the weekFridayproleptic Gregorian; contemporaries used the Julian calendar and would have named a different day
Day of the month1st
Day of the year121 of 365
Days remaining in the year244
Days elapsed in the year120
ISO week numberWeek 18ISO 8601, weeks start on Monday
Week of the month1st
Occurrence in the month1st Friday
MonthMay (month 5 of 12)
QuarterQ2 1378
Year1378
Days in the month31
Leap yearNo, 365 days
This date in other formats
ISO 86011378-05-01
British (D/M/Y)01/05/1378
American (M/D/Y)05/01/1378
Long formFriday 1st May 1378
RFC 2822Fri, 01 May 1378 00:00:00 GMT
Compact13780501
In wordsthe 1st of May, one thousand, three hundred and seventy-eight
Julian calendar equivalent23 April 1378the date contemporaries would have written, before the Gregorian calendar existed
This date in other calendars
Hebrew25 Nisan 5138the Hebrew calendar has been fully algorithmic since the ninth century, so this is exact
Islamic (tabular)24 Dhu al-Hijjah 779 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 Ordibehesht 757the arithmetic (Birashk) calendar; the official Solar Hijri calendar takes its new year from the astronomical equinox at Tehran
Rata Die503,060days since 1 January 1 CE in the proleptic Gregorian calendar, the pivot every conversion here runs through
Unix time & day counts
Unix timestamp-18,671,299,200seconds since 1 January 1970, midnight UTC
Unix timestamp (ms)-18,671,299,200,000
Relationship to the epoch216,103 days before the Unix epoch
Julian Day Number2,224,485midnight UTC
Days since 1 January 1900-190,536
Days since 1 January 2000-227,060
Moon phase
PhaseWaning crescentthe same phase everywhere on Earth at the same instant
Illuminated at 12:00 UTC23%≈to about 1%, by Meeus
Waxing or waningWaning
Moon age at 12:00 UTC25.2 dayssince the previous new moon
Previous new moon6 April 1378
Next new moon5 May 1378
Previous full moon21 April 1378
Next full moon21 May 1378
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.
Today18 September 2026
Days ago236,817 days
In other terms648 years and 135 days
Weeks33831.0 weeks ago
Anniversary this year140 days ago
Years elapsed648 complete years
Seasons & signs
Zodiac signTaurusEarth sign
Chinese zodiac yearHorsethe animal changes at Chinese New Year, not 1 January
Season (Northern Hemisphere)Springmeteorological seasons, by whole months
Season (Southern Hemisphere)Autumn
Easter Sunday that year29 March 1378
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