| 15 January: | Martin Luther King Day is celebrated in the United States the third Monday each year since 1986. | |
| 17 January: | The Julian calendar including its New Year's Day is delayed by 16 days. | |
| 30 January: | At this Chinese New Year the Ram makes room for the Year of the Monkey. | |
| 13 April: | Jews celebrate Pesach for the next seven or eight days. | |
| 14 April: | 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. | |
| 2 June: | Seven weeks after Easter Christians celebrate Pentecost, possibly since 68 AD. | |
| 27 June: | The thirty days of Ramadan in the Islamic year 1771 begin at the first sighting of the lunar crescent. | |
| 27 July: | Muslims celebrate the Conclusion of the Fast on the first day of the month Shawwal. | |
| 2 October: | Jews celebrate Yom Kippur since sunset last night. | |
| 3 October: | Muslims celebrate the Festival of Sacrifice on the tenth day of the month Dhu al-Hijjah. | |
| 24 December: | Christmas Eve starts off the holidays celebrating the birth of Jesus of Nazareth. |
The year 2340 is a leap year starting on a Monday, just like 2244, 2272 and 2312 in the century before it and 2368, 2396 and 2424 in the next.
The coloured days highlight
births
,
deaths
,
political
,
scientific
,
artistic
and
other
historical milestones, and recurring events such as anniversaries and
holidays
.
The new
,
waxing
,
full
and
waning
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?2013 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.