< DCXLII = 642 >
Events in 642
|24 March:|| ||Jews celebrate Pesach for the next seven or eight days.|
|24 March:|| ||The resurrection of Jesus Christ is celebrated on Easter Sunday following the first full moon following the spring equinox since the Council of Nicaea in 325.|
|12 May:|| ||Seven weeks after Easter Christians celebrate Pentecost, possibly since 68 AD.|
|3 Augustus:|| ||The thirty days of Ramadan in the Islamic year 21 begin at the first sighting of the lunar crescent.|
|2 September:|| ||Muslims celebrate the Conclusion of the Fast on the first day of the month Shawwal.|
|12 September:|| ||Jews celebrate Yom Kippur since sunset last night.|
|17 September:|| ||Arabs led by Omar, the second caliph, conquer Alexandria and destroy what is left of the Great Library.|
|9 November:|| ||Muslims celebrate the Festival of Sacrifice on the tenth day of the month Dhu al-Hijjah.|
People in 642
'Umar ibn al-Khattāb and Ali ibn Abu Talib celebrated their birthday this year.
The year 642 was a common year starting on a Tuesday, just like 547, 558, 569, 575, 586, 597, 603, 614, 625 and 631 in the century before it and 653, 659, 670, 681, 687, 698, 709, 715, 726 and 737 in the next.
The coloured days highlight
other historical milestones, and recurring events such as anniversaries and
icons indicate the phases of the moon and appear only for dates in the Gregorian calendar, i.e. after 14 October 1582. The Chinese calendar is available only from 1645 to 2644, the first millenium since the last reform. The coloured columns mark the Sundays, the last day of the week per standard ISO-8601.
The normal calendar page for the current /year?2018 contains an introduction to the intriguing history of the year as we know it. The Calendar Converter has more detail. The so called Perpetual Calendar uses a trick from before the age of computers to find the weekday for any Gregorian date. Also see an overview of all historical events in the last six thousand years.
URL: < http://4umi.com/year?642 >, created 23 January 2011, changed 13 September 2012, served 19 April 2018.