Kurdish calendar throughout Kurdistan follow the same principal structure for the "Kurdish days of the week". The Kurdish name for the first day of the week Sheme (Saturday) is in fact descended from Akkadian word Shabattu (In Sumerian Shabbât, Arabic Sabbath, Pahlavic Shunbat, Persian Shambed; Shamba; Shanbeh, even transferred to Greek as Sabbaton, German Samstag, Italian sabato, Spanish sábado, French Samedi). The Akkadian called the 15th day of the month, the day a full moon appears, Shabbattu. The question still remains why such an adoption was made for Kurdish and Persian days of the week. It has been documented that the Babylonian
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