Happy easter
Response from developer
Thank you for this note! The calculation in this App is based on the Gregorian Calendar. This calendar was first introduced in 1582 in some territories, but later in others (e.g. 1752 in the Kingdom of Great Britain and it‘s american colonies, 1867 in Alaska, 1923 in Greece, etc.) So please be aware that the easter date calculation is only correct, if the territory in question had already changed to the Gregorian Calendar at the specified date.