Thirteen Month Calendar. Web the united nations has decided to adopt a new calendar system featuring 13 months, each consisting of 28 days, and an extra day added as a holiday at the end of. In prehistoric india and china, and throughout south america.
Perpetual Thirteen Month Calendar
Rules [ edit ] the calendar. Web the united nations has decided to adopt a new calendar system featuring 13 months, each consisting of 28 days, and an extra day added as a holiday at the end of. In prehistoric india and china, and throughout south america.
Rules [ edit ] the calendar. In prehistoric india and china, and throughout south america. Rules [ edit ] the calendar. Web the united nations has decided to adopt a new calendar system featuring 13 months, each consisting of 28 days, and an extra day added as a holiday at the end of.
