The Every Day Calendar is on Kickstarter and has already raised $412,875, way past the initial $35,000 target. Or you can download the schematics for free and build it yourself.

Nearly every four years, the Gregorian calendar — which is used in the majority of countries around the world — gets an extra day: February 29. For some people, leap day means frog jokes and ...

If you haven't already grabbed an Advent calendar, expect your options to be limited and be prepared to go the do-it-yourself route.. For many of the holiday calendars, Dec. 1 is the first day to ...