Zeller's Congruence

[jefranki]

Looks like the problem is ((m+1)26). Possibly need a arithmetic operator between the right paren and 26???

h = ( q + floor( ((m+1)26) / 10 ) + y + floor(y/4) + 6 * floor(y/100) + floor(y/400)) % 7;

All the variables are already ints so using the floor() function is redundant. You also might want to look into putting some error guards in against invalid dates like February 29 in a non-leap year, or September 31.

Out of curiosity...what is the reason behind the non-standard numeric assignment of the weekdays and months?