Recognised as Date
18 May 1415
- Thursday
- Q2
- Common year
- Week 20
- Taurus
18 May 1415 falls on a Thursday in the proleptic Gregorian calendar, which did not yet exist at the time. It is day 138 of 365 in 1415, falling in week 20 and quarter 2. Its Unix timestamp is -17,502,307,200.
Calendar position
Day of the weekThursdayproleptic Gregorian; contemporaries used the Julian calendar and would have named a different day
Day of the month18th
Day of the year138 of 365
Days remaining in the year227
Days elapsed in the year137
ISO week numberWeek 20ISO 8601, weeks start on Monday
Week of the month3rd
Occurrence in the month3rd Thursday
MonthMay (month 5 of 12)
QuarterQ2 1415
Year1415
Days in the month31
Leap yearNo, 365 days
This date in other formats
ISO 86011415-05-18
British (D/M/Y)18/05/1415
American (M/D/Y)05/18/1415
Long formThursday 18th May 1415
RFC 2822Thu, 18 May 1415 00:00:00 GMT
Compact14150518
In wordsthe 18th of May, one thousand, four hundred and fifteen
Julian calendar equivalent9 May 1415the date contemporaries would have written, before the Gregorian calendar existed
This date in other calendars
Hebrew29 Iyyar 5175the Hebrew calendar has been fully algorithmic since the ninth century, so this is exact
Islamic (tabular)28 Safar 818 AHthe tabular reckoning; the calendar in religious use begins each month on an actual crescent sighting, so expect a day either way
Persian (arithmetic)27 Ordibehesht 794the arithmetic (Birashk) calendar; the official Solar Hijri calendar takes its new year from the astronomical equinox at Tehran
Rata Die516,590days since 1 January 1 CE in the proleptic Gregorian calendar, the pivot every conversion here runs through
Unix time & day counts
Unix timestamp-17,502,307,200seconds since 1 January 1970, midnight UTC
Unix timestamp (ms)-17,502,307,200,000
Relationship to the epoch202,573 days before the Unix epoch
Julian Day Number2,238,015midnight UTC
Days since 1 January 1900-177,006
Days since 1 January 2000-213,530
Moon phase
PhaseWaxing crescentthe same phase everywhere on Earth at the same instant
Illuminated at 12:00 UTC0%≈to about 1%, by Meeus
Waxing or waningWaxing
Moon age at 12:00 UTC0.5 dayssince the previous new moon
Previous new moon18 May 1415
Next new moon16 June 1415
Previous full moon3 May 1415
Next full moon1 June 1415
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.
Today19 September 2026
Days ago223,288 days
In other terms611 years, 120 days and 6 hours
Weeks31898.3 weeks ago
Anniversary this year124 days ago
Years elapsed611 complete years
Seasons & signs
Zodiac signTaurusEarth sign
Chinese zodiac yearGoatthe animal changes at Chinese New Year, not 1 January
Season (Northern Hemisphere)Springmeteorological seasons, by whole months
Season (Southern Hemisphere)Autumn
Easter Sunday that year9 April 1415
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