Recognised as Date
20 July 1571
- Tuesday
- Q3
- Common year
- Week 29
- Cancer
20 July 1571 falls on a Tuesday in the proleptic Gregorian calendar, which did not yet exist at the time. It is day 201 of 365 in 1571, falling in week 29 and quarter 3. Its Unix timestamp is -12,573,964,800.
Calendar position
Day of the weekTuesdayproleptic Gregorian; contemporaries used the Julian calendar and would have named a different day
Day of the month20th
Day of the year201 of 365
Days remaining in the year164
Days elapsed in the year200
ISO week numberWeek 29ISO 8601, weeks start on Monday
Week of the month3rd
Occurrence in the month3rd Tuesday
MonthJuly (month 7 of 12)
QuarterQ3 1571
Year1571
Days in the month31
Leap yearNo, 365 days
This date in other formats
ISO 86011571-07-20
British (D/M/Y)20/07/1571
American (M/D/Y)07/20/1571
Long formTuesday 20th July 1571
RFC 2822Tue, 20 Jul 1571 00:00:00 GMT
Compact15710720
In wordsthe 20th of July, one thousand, five hundred and seventy-one
Julian calendar equivalent10 July 1571the date contemporaries would have written, before the Gregorian calendar existed
This date in other calendars
Hebrew17 Tammuz 5331the Hebrew calendar has been fully algorithmic since the ninth century, so this is exact
Islamic (tabular)16 Safar 979 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 Tir 950the arithmetic (Birashk) calendar; the official Solar Hijri calendar takes its new year from the astronomical equinox at Tehran
Rata Die573,631days since 1 January 1 CE in the proleptic Gregorian calendar, the pivot every conversion here runs through
Unix time & day counts
Unix timestamp-12,573,964,800seconds since 1 January 1970, midnight UTC
Unix timestamp (ms)-12,573,964,800,000
Relationship to the epoch145,532 days before the Unix epoch
Julian Day Number2,295,056midnight UTC
Days since 1 January 1900-119,965
Days since 1 January 2000-156,489
Moon phase
PhaseWaning gibbousthe same phase everywhere on Earth at the same instant
Illuminated at 12:00 UTC84%≈to about 1%, by Meeus
Waxing or waningWaning
Moon age at 12:00 UTC18.1 dayssince the previous new moon
Previous new moon2 July 1571
Next new moon1 August 1571
Previous full moon17 July 1571
Next full moon15 August 1571
Lit side, Northern HemisphereLeft
Lit side, Southern HemisphereRightthe 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.
Today18 September 2026
Days ago166,246 days
In other terms455 years, 57 days and 6 hours
Weeks23749.4 weeks ago
Anniversary this year60 days ago
Years elapsed455 complete years
Seasons & signs
Zodiac signCancerWater sign
Chinese zodiac yearGoatthe animal changes at Chinese New Year, not 1 January
Season (Northern Hemisphere)Summermeteorological seasons, by whole months
Season (Southern Hemisphere)Winter
Easter Sunday that year25 April 1571
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