(list (calendar-gregorian-from-absolute (+ abs-easter 49))
"Pentecost (Whitsunday)")
(list (calendar-gregorian-from-absolute (+ abs-easter 50))
- "Whitmunday")
+ "Whitmonday")
(list (calendar-gregorian-from-absolute (+ abs-easter 56))
"Trinity Sunday")
(list (calendar-gregorian-from-absolute (+ abs-easter 60))