Happy new year!

Theorem of the Day is offering a new year's present that some of you might enjoy: A calendar containing 12 theorems by women mathematicians!

The author is selling printed copies of the calendar, but since shipping costs worldwide are somewhat prohibitive, it's also being offered as a free download, in order to encourage people to have Women in Mathematics calendars in school and college classrooms all over the world. Hopefully, some of you will have time to print one out and share the math and the joy.

Happy new year everyone!