The Calendar
What the atlas records for this date, across the traditions it covers.
Observed On This Date
Commemoration of a person or event
Every 19 January, Julian (Old Calendar) reckoning.
Terr 11 in the Ethiopian calendar. 20 January in an Ethiopian leap year.
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.