Holy day of obligation transferred to the following Sunday, the Feast of the Ascension of Our Lord, though not a holy day of obligation in Greece, is kept on the Thursday of the sixth week of Easter, in order to celebrate it on the same day as the Orthodox Church of Greece. Bishops' Conference of Indonesia has not issued regulation about holy day of obligation, so ten holy days on Can. 1246 § 1 applied. The following day is also a holy day of obligation in all of Ireland: (See "Working holy days", above) “Ireland” includes the entire island of Ireland, i.e. both the
Determination of the day of the week the intended design objective. The tabular forerunner to Tøndering's algorithm is embodied in the following K&R C function. With minor changes, it was adapted for other high level programming languages such as APL2. Posted by Tomohiko Sakamoto on the comp.lang.c Usenet newsgroup in 1992, it is accurate for any Gregorian date. IBM's Rata Die method requires that one knows the "key day" of the proleptic Gregorian calendar i.e. the day of the week of January 1, AD 1 (its first date). This has to be done to establish the remainder number based on which the day of the week is