Modified Description from Nasa’s post-Mayan apocalypse video released 10 days early: A film from Nasa about the Mayan prophecy that the world will end on 21 December was released 10 days early on Dec 13th. The Mayan calendar’s 5,125-year run is due to end tomorrow, but the film – entitled The World Didn’t End Yesterday – argues that the calendar should be interpreted as cyclical.