Calendar Converter is a simple tool for converting a date in one calendar to the date(s) in the others by using
the functions provided by macOS. The following calendars are supported.
・Chinese (Sexagenary cycle)
・Ethiopic (Amete Alem)
・Islamic (Tabular, Friday origin)
・Islamic (Tabular, Thursday origin)
・Islamic (Umm al-Qura)
・Republic of China