Recognised as Date
1 May 1423
- Thursday
- Q2
- Common year
- Week 18
- Taurus
1 May 1423 falls on a Thursday in the proleptic Gregorian calendar, which did not yet exist at the time. It is day 121 of 365 in 1423, falling in week 18 and quarter 2. Its Unix timestamp is -17,251,315,200.
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 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 Thursday
MonthMay (month 5 of 12)
QuarterQ2 1423
Year1423
Days in the month31
Leap yearNo, 365 days
This date in other formats
ISO 86011423-05-01
British (D/M/Y)01/05/1423
American (M/D/Y)05/01/1423
Long formThursday 1st May 1423
RFC 2822Thu, 01 May 1423 00:00:00 GMT
Compact14230501
In wordsthe 1st of May, one thousand, four hundred and twenty-three
Julian calendar equivalent22 April 1423the date contemporaries would have written, before the Gregorian calendar existed
This date in other calendars
Hebrew11 Iyyar 5183the Hebrew calendar has been fully algorithmic since the ninth century, so this is exact
Islamic (tabular)11 Jumada I 826 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 Ordibehesht 802the arithmetic (Birashk) calendar; the official Solar Hijri calendar takes its new year from the astronomical equinox at Tehran
Rata Die519,495days since 1 January 1 CE in the proleptic Gregorian calendar, the pivot every conversion here runs through
Unix time & day counts
Unix timestamp-17,251,315,200seconds since 1 January 1970, midnight UTC
Unix timestamp (ms)-17,251,315,200,000
Relationship to the epoch199,668 days before the Unix epoch
Julian Day Number2,240,920midnight UTC
Days since 1 January 1900-174,101
Days since 1 January 2000-210,625
Moon phase
PhaseWaxing gibbousthe same phase everywhere on Earth at the same instant
Illuminated at 12:00 UTC89%≈to about 1%, by Meeus
Waxing or waningWaxing
Moon age at 12:00 UTC11.5 dayssince the previous new moon
Previous new moon19 April 1423
Next new moon19 May 1423
Previous full moon5 April 1423
Next full moon4 May 1423
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.
Today21 September 2026
Days ago220,385 days
In other terms603 years, 139 days and 6 hours
Weeks31483.6 weeks ago
Anniversary this year143 days ago
Years elapsed603 complete years
Seasons & signs
Zodiac signTaurusEarth sign
Chinese zodiac yearRabbitthe animal changes at Chinese New Year, not 1 January
Season (Northern Hemisphere)Springmeteorological seasons, by whole months
Season (Southern Hemisphere)Autumn
Easter Sunday that year6 April 1423
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