Recognised as Date
18 August 1988
- Thursday
- Q3
- Leap year
- Week 33
- Leo
18 August 1988 falls on a Thursday. It is day 231 of 366 in 1988, a leap year, falling in week 33 and quarter 3. Its Unix timestamp is 587,865,600.
Calendar position
Day of the weekThursday
Day of the month18th
Day of the year231 of 366
Days remaining in the year135
Days elapsed in the year230
ISO week numberWeek 33ISO 8601, weeks start on Monday
Week of the month3rd
Occurrence in the month3rd Thursday
QuarterQ3 1988
Year1988
Days in the month31
Leap yearYes, 366 days
This date in other formats
ISO 86011988-08-18
British (D/M/Y)18/08/1988
American (M/D/Y)08/18/1988
Long formThursday 18th August 1988
RFC 2822Thu, 18 Aug 1988 00:00:00 GMT
Compact19880818
In wordsthe 18th of August, one thousand, nine hundred and eighty-eight
This date in other calendars
Hebrew5 Elul 5748the Hebrew calendar has been fully algorithmic since the ninth century, so this is exact
Islamic (tabular)5 Muharram 1409 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 Mordad 1367the arithmetic (Birashk) calendar; the official Solar Hijri calendar takes its new year from the astronomical equinox at Tehran
Rata Die725,967days since 1 January 1 CE in the proleptic Gregorian calendar, the pivot every conversion here runs through
Unix time & day counts
Unix timestamp587,865,600seconds since 1 January 1970, midnight UTC
Unix timestamp (ms)587,865,600,000
Relationship to the epoch6,804 days after the Unix epoch
Julian Day Number2,447,392midnight UTC
Days since 1 January 190032,371
Days since 1 January 2000-4,153
Moon phase
PhaseWaxing crescentthe same phase everywhere on Earth at the same instant
Illuminated at 12:00 UTC29%≈to about 1%, by Meeus
Waxing or waningWaxing
Moon age at 12:00 UTC6 dayssince the previous new moon
Previous new moon12 August 1988, 12:31 UTC
Next new moon11 September 1988, 04:49 UTC
Previous full moon29 July 1988, 03:25 UTC
Next full moon27 August 1988, 10:56 UTC
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
Relative to today
These values depend on today’s date and change daily.
Today20 September 2026
Days ago13,912 days
In other terms38 years, 32 days and 12 hours
Weeks1987.4 weeks ago
Anniversary this year33 days ago
Years elapsed38 complete years
Seasons & signs
Zodiac signLeoFire sign
Chinese zodiac yearDragonthe animal changes at Chinese New Year, not 1 January
Season (Northern Hemisphere)Summermeteorological seasons, by whole months
Season (Southern Hemisphere)Winter
Easter Sunday that year3 April 1988
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