| 摘要 |
PURPOSE:To calculate a day of the week for a certain year, month and day automatically and exactly with a simple arithmetic processor. CONSTITUTION:Constituted are a date input device 11 to input year, month and day, memory device 13 to store a reference year before the date and reference day of the week to be the previous day of the week of begining of each month belonging to this reference year, a date input device 11, a day of the week processor 12 to calculate the day of the week of the date input based on the data from the memory device 13 and a day of the week output device 14 to output the calculated day of the week. |
