(HP 41 CV/CX, DM41) Date of Easter sunday

[rawi]

HP 67 wrote:

Quote:I seem to remember Gauss published one for Easter, but maybe I'm wrong about that.

No, you are not wrong about that. In German wikipedia there is an article about "Gaußsche Osterformel" (Easter formula by Gauss"): https://de.wikipedia.org/wiki/Gau%C3%9Fsche_Osterformel

I did not check completely but the solution in the book I used seems to be the solution by Gauss.