| 摘要 |
PURPOSE:To completely prevent the wrong input of date correction by prohibiting the display of the non-existing date not only in an ordinary state but at the time of correction as well. CONSTITUTION:The year, the month and the date are first displayed 6 in accordance with a clocking action. The display 6 of the year, the month or the date is then corrected in accordance with correction input. Whether the corrected year is a leap year or not is decided. The final date of the correction-displayed month is set at the 29th day if said month is February and when the displayed 6 hear is a leap year. The month is set at 28 when said year is a common year. The final date is set according to whether the month is a 31-day month or a month with thirty or less days if the correction displayed month is except February. The set final date is displayed after the 1st day and the 1st day is displayed after the set final day, respectively, at the time of changing the display of the date for the purpose of correction so that the display of the non-existing date of the displayed month is prohibited. The wrong input of the date correction is completely prevented in this way. |
