Recognised as Date
21 May 2010
- Friday
- Q2
- Common year
- Week 20
- Gemini
21 May 2010 was a Friday. It was day 141 of 365 in 2010, falling in week 20 and quarter 2. Its Unix timestamp is 1,274,400,000.
Calendar position
Day of the weekFriday
Day of the month21st
Day of the year141 of 365
Days remaining in the year224
Days elapsed in the year140
ISO week numberWeek 20ISO 8601, weeks start on Monday
Week of the month3rd
Occurrence in the month3rd Friday
MonthMay (month 5 of 12)
QuarterQ2 2010
Year2010
Days in the month31
Leap yearNo, 365 days
This date in other formats
ISO 86012010-05-21
British (D/M/Y)21/05/2010
American (M/D/Y)05/21/2010
Long formFriday 21st May 2010
RFC 2822Fri, 21 May 2010 00:00:00 GMT
Compact20100521
In wordsthe 21st of May, two thousand and ten
This date in other calendars
Hebrew8 Sivan 5770the Hebrew calendar has been fully algorithmic since the ninth century, so this is exact
Islamic (tabular)7 Jumada II 1431 AHthe tabular reckoning; the calendar in religious use begins each month on an actual crescent sighting, so expect a day either way
Persian (arithmetic)31 Ordibehesht 1389the arithmetic (Birashk) calendar; the official Solar Hijri calendar takes its new year from the astronomical equinox at Tehran
Rata Die733,913days since 1 January 1 CE in the proleptic Gregorian calendar, the pivot every conversion here runs through
Unix time & day counts
Unix timestamp1,274,400,000seconds since 1 January 1970, midnight UTC
Unix timestamp (ms)1,274,400,000,000
Relationship to the epoch14,750 days after the Unix epoch
Julian Day Number2,455,338midnight UTC
Days since 1 January 190040,317
Days since 1 January 20003,793
Relative to today
These values depend on today’s date and change daily.
Today14 September 2026
Days ago5,960 days
In other terms16 years and 116 days
Weeks851.4 weeks ago
Anniversary this year116 days ago
Years elapsed16 complete years
Seasons & signs
Zodiac signGeminiAir sign
Chinese zodiac yearTigerthe animal changes at Chinese New Year, not 1 January
Season (Northern Hemisphere)Springmeteorological seasons, by whole months
Season (Southern Hemisphere)Autumn
Easter Sunday that year4 April 2010
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