The Calendar
What the atlas records for this date, across the traditions it covers.
Observed On This Date
Commemoration of a person or event
Fixed Gregorian date, 10 November, every year.
Marks the 1494 publication of Luca Pacioli's Summa de Arithmetica, Geometria, Proportioni et Proportionalita, whose account of Venetian bookkeeping practice was the first codification of double-entry bookkeeping.
Dates for the Hebrew and Islamic calendars are the tabular reckoning, which is what a printed calendar prints. Communities that begin a month on a sighted crescent may differ by a day, and differ from one another by place.