October 13 occurs toward the middle of October and is the 286th day of a common year and the 287th day in a leap year in the Gregorian calendar. In a common year there are 79 days remaining after October 13. Because it falls well into the second half of the year, the date sits in autumn in the Northern Hemisphere and spring in the Southern Hemisphere.
Overview and calendar facts
The ordinal position of October 13 (day 286/287) changes only when February gains a day in a leap year; therefore events dated by day-of-year shift by one after February in leap years. The weekday that October 13 falls on rotates according to the irregular pattern of leap years, so its relation to particular weekdays varies from year to year.
Observances and commemorations
- International Day for Disaster Risk Reduction — observed by the United Nations system to promote disaster risk reduction and resilience.
- Religious feasts — several Christian traditions mark saints’ days or memorials on or near this date (for example the feast of Edward the Confessor in some Western calendars).
- Local and national observances — many countries and communities mark local anniversaries, memorials or cultural events that fall on October 13; such observances vary by place and year.
Notable historical events
- The date is associated with large, widely remembered incidents: among them, the reported "Miracle of the Sun" witnessed at Fátima, Portugal, in 1917, an event important to modern Catholic devotion.
- October 13, 1972, was the day of the crash of Uruguayan Air Force Flight 571 in the Andes; the subsequent survival and rescue story drew international attention.
- Earlier history links the date to events such as the suppression of the Knights Templar in France (1307), an episode often cited in discussions of the origin of the superstition about Friday the 13th.
Because October 13 sits in mid-October it is often used as a milestone in financial, academic and cultural calendars: academic terms may have started earlier in the month; fiscal or reporting periods often use mid-month dates like the 13th as cutoffs; seasonal festivals and harvest activities are commonly scheduled around this time in many regions.
When researching or commemorating an event on October 13, it is useful to note whether the year in question was a leap year, and which civil calendar was in use at the time, since older historical dates may be recorded under different calendar systems. For general reference and calendar conversions consult authoritative calendar resources or institutional observance lists.
For additional background on leap-year rules and the history and structure of the modern calendar see resources on leap years and the Gregorian calendar.