Recognised as Date
18 May 1165
- Tuesday
- Q2
- Common year
- Week 20
- Taurus
18 May 1165 falls on a Tuesday in the proleptic Gregorian calendar, which did not yet exist at the time. It is day 138 of 365 in 1165, falling in week 20 and quarter 2. Its Unix timestamp is -25,391,491,200.
Calendar position
Day of the weekTuesdayproleptic 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 Tuesday
MonthMay (month 5 of 12)
QuarterQ2 1165
Year1165
Days in the month31
Leap yearNo, 365 days
This date in other formats
ISO 86011165-05-18
British (D/M/Y)18/05/1165
American (M/D/Y)05/18/1165
Long formTuesday 18th May 1165
RFC 2822Tue, 18 May 1165 00:00:00 GMT
Compact11650518
In wordsthe 18th of May, one thousand, one hundred and sixty-five
Julian calendar equivalent11 May 1165the date contemporaries would have written, before the Gregorian calendar existed
This date in other calendars
Hebrew27 Iyyar 4925the Hebrew calendar has been fully algorithmic since the ninth century, so this is exact
Islamic (tabular)27 Jumada II 560 AHthe tabular reckoning; the calendar in religious use begins each month on an actual crescent sighting, so expect a day either way
Persian (arithmetic)28 Ordibehesht 544the arithmetic (Birashk) calendar; the official Solar Hijri calendar takes its new year from the astronomical equinox at Tehran
Rata Die425,280days since 1 January 1 CE in the proleptic Gregorian calendar, the pivot every conversion here runs through
Unix time & day counts
Unix timestamp-25,391,491,200seconds since 1 January 1970, midnight UTC
Unix timestamp (ms)-25,391,491,200,000
Relationship to the epoch293,883 days before the Unix epoch
Julian Day Number2,146,705midnight UTC
Days since 1 January 1900-268,316
Days since 1 January 2000-304,840
Moon phase
PhaseWaning crescentthe same phase everywhere on Earth at the same instant
Illuminated at 12:00 UTC0%≈to about 1%, by Meeus
Waxing or waningWaning
Moon age at 12:00 UTC28.9 dayssince the previous new moon
Previous new moon19 April 1165
Next new moon19 May 1165
Previous full moon5 May 1165
Next full moon3 June 1165
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.
Today20 September 2026
Days ago314,599 days
In other terms861 years, 118 days and 18 hours
Weeks44942.7 weeks ago
Anniversary this year125 days ago
Years elapsed861 complete years
Seasons & signs
Zodiac signTaurusEarth sign
Chinese zodiac yearRoosterthe animal changes at Chinese New Year, not 1 January
Season (Northern Hemisphere)Springmeteorological seasons, by whole months
Season (Southern Hemisphere)Autumn
Easter Sunday that year11 April 1165
Keep nerding
Every link below is a page Nerdulator can generate from what it already knows about this value.
Adjacent days
The same day in other years
Nerdulate something else
Nothing in mind? Surprise me · today’s page