Calendar Magic
Full year and individual month Gregorian, Afghan, Armenian, Baha’i, Balinese Pawukon (full year only), Balinese Saka, Bangla, Chinese, Coptic, Egyptian, Ethiopic, French Revolutionary, Hebrew, Hindu Lunisolar (3 variants), Hindu Solar, Indian National, Islamic Arithmetical (8 variants), Julian, Revised Julian, Parsi Fasli, Parsi Kadmi, Parsi Shenshai, Persian (2 variants), Sikh Nanakshahi and Vietnamese calendars. A user option is provided to choose between displaying/printing calendars showing each week starting on a Monday (in line with the ISO 8601 international standard), on a Sunday for North American users, or on a Saturday for Middle East users.

If your game uses an alternate calendar system, then this program is for you.