On Planet Plex, there are only 6 hours in the day. Can you answer
these questions about how Arog the Alien spends his day?
Read this article to find out the mathematical method for working out what day of the week each particular date fell on back as far as 1700.
Calendars were one of the earliest calculating devices developed by civilizations. Find out about the Mayan calendar in this article.
How many days were there between February 25th 2000
and March 11th ?