The Calendar
What the atlas records for this date, across the traditions it covers.
Observed On This Date
Vigil / night observance
31 October, the vigil of All Saints
Commemoration of a person or event
31 October
Memorial of the dead
31 October to 1 November
Day 1 of 2
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.