関連ワード:  how to check if weekday in excel    how to check if weekend in excel    how to check for weekend in excel    how to check if date is weekday in excel    how to check if date is weekend in excel    how to check if day is weekend in excel    how to check weekday in excel    how to check if a day is a weekday in excel    how to determine if date is weekend in excel    how to check day of week in excel