Recognised as Date
17 August 1429
- Monday
- Q3
- Common year
- Week 34
- Leo
17 August 1429 falls on a Monday in the proleptic Gregorian calendar, which did not yet exist at the time. It is day 229 of 365 in 1429, falling in week 34 and quarter 3. Its Unix timestamp is -17,052,595,200.
Calendar position
Day of the weekMondayproleptic Gregorian; contemporaries used the Julian calendar and would have named a different day
Day of the month17th
Day of the year229 of 365
Days remaining in the year136
Days elapsed in the year228
ISO week numberWeek 34ISO 8601, weeks start on Monday
Week of the month3rd
Occurrence in the month3rd Monday
QuarterQ3 1429
Year1429
Days in the month31
Leap yearNo, 365 days
This date in other formats
ISO 86011429-08-17
British (D/M/Y)17/08/1429
American (M/D/Y)08/17/1429
Long formMonday 17th August 1429
RFC 2822Mon, 17 Aug 1429 00:00:00 GMT
Compact14290817
In wordsthe 17th of August, one thousand, four hundred and twenty-nine
Julian calendar equivalent8 August 1429the date contemporaries would have written, before the Gregorian calendar existed
This date in other calendars
Hebrew8 Elul 5189the Hebrew calendar has been fully algorithmic since the ninth century, so this is exact
Islamic (tabular)7 Dhu al-Qidah 832 AHthe tabular reckoning; the calendar in religious use begins each month on an actual crescent sighting, so expect a day either way
Persian (arithmetic)26 Mordad 808the arithmetic (Birashk) calendar; the official Solar Hijri calendar takes its new year from the astronomical equinox at Tehran
Rata Die521,795days since 1 January 1 CE in the proleptic Gregorian calendar, the pivot every conversion here runs through
Unix time & day counts
Unix timestamp-17,052,595,200seconds since 1 January 1970, midnight UTC
Unix timestamp (ms)-17,052,595,200,000
Relationship to the epoch197,368 days before the Unix epoch
Julian Day Number2,243,220midnight UTC
Days since 1 January 1900-171,801
Days since 1 January 2000-208,325
Moon phase
PhaseWaxing gibbousthe same phase everywhere on Earth at the same instant
Illuminated at 12:00 UTC56%≈to about 1%, by Meeus
Waxing or waningWaxing
Moon age at 12:00 UTC8 dayssince the previous new moon
Previous new moon9 August 1429
Next new moon8 September 1429
Previous full moon25 July 1429
Next full moon23 August 1429
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
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 ago218,082 days
In other terms597 years, 27 days and 18 hours
Weeks31154.6 weeks ago
Anniversary this year32 days ago
Years elapsed597 complete years
Seasons & signs
Zodiac signLeoFire sign
Chinese zodiac yearRoosterthe animal changes at Chinese New Year, not 1 January
Season (Northern Hemisphere)Summermeteorological seasons, by whole months
Season (Southern Hemisphere)Winter
Easter Sunday that year29 March 1429
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