On 8/28/21 2:27 PM, Peter Noeth wrote:
A printed wall calendar was one of my first TRS-80 16K Model 1 Level
II (then a 48K with expansion Interface) programs after I designed an
interface to the IBM Selectric I/O Writer I purchased as surplus
where I was working at the time. I could never get the
bizarre algorithm correct to calculate the religious Easter observance
date though. The other holidays were no problem.
Easter (according to Wikipedia):
Y = Year
D = (19*(Y mod 19) + 15) mod 30 + (2 * (Y mod 4) + 4 * (Y mod 7) -
(19*(Y mod 19) + 15) mod 30) + 34) mod 7 + 127
Month = floor( D / 31)
Day = (D mod 31) + 1
What, that didn't just roll off the top of your head back in the 80's? :D
Ken
