Lent Ember Days of 2023 are Wed/Fri/Sat March 1, 3, and 4. While a fast is not obligatory, it is a worthy and traditional spiritual practice to fast or abstain in some way on these days.
Note about variation in the Autumn Ember Days On the 1962 (or newer) calendar, the Autumn Ember Days will fall on the Wednesday, Friday, and Saturday after the third Sunday in September (i.e., Sept. 21, 23, and 24, 2022). This will always follow Holy Cross Day, but the days might not fall in the same week that honors the Feast of the Holy Cross (which is always September 14). Older calendars will have the Autumn Ember Days as the Wednesday, Friday, and Saturday that immediately come after Holy Cross Day, no matter how many Sundays come before.