| 摘要 |
PROBLEM TO BE SOLVED: To provide a calendar display device that can make possible easier acquisition of a more accurate Hejira calendar date at a geographical point desired by a user.SOLUTION: A calendar display device comprises time counting means that counts days by the Christian calendar, calendar converting means that uses a prescribed conversion table to convert a date by the Christian calendar into a date by the Hejira calendar, moon position calculating means that calculates the sunset time in a set position and the position of the moon at this sunset time, month beginning day determining means that determines the first day of a month by the Hejira calendar on the basis of the calculated moon position, date setting means that sets the day of an output object by the Hejira according to the date by the Hejira calendar converted by the calendar converting means and the result of determination by the month beginning day determining means, and displaying means that displays the date of this set output object. |
