http://mathdl.maa.org/mathDL/?pa=mathNews&sa=view&newsId=970

Celebrate math in two ways this month.

A Gathering 4 Gardner, in celebration of the late Martin
Gardner's birthday, will happen October 21. Gatherings will
take place worldwide. Don't see one in the works near you? Use
G4G's puzzles, illusions, games, and other resources to plan
your own party! Read more here:

http://www.g4g-com.org/

As part of this celebration, The Mathematical Association of
America and ThinkFun will host a reception on October 21 in
Washington, DC. Featured speakers include Ivars Peterson,
author of *The Mathematical Tourist* book and blog; ThinkFun's
Bill Ritchie; Gardner biographer Dana Richards; puzzlist Eve
Torrence, Professor of Mathematics at Randolph Macon College;
and Chip Denman, of the National Capital Area Skeptics. Space
is limited. Read more or RSVP at:

http://maa.org/pubs/G4G2010.html

The second event is the first-ever USA Science & Engineering
Festival, a two-day expo held on the National Mall in
Washington, DC, October 23-24. Over 500 organizations will
participate, offering hundreds of hands-on activities. Look for
the MAA's banner "Math is Everywhere" to play with Euler square
puzzles, fold origami, and take interactive quizzes based on
the AMC 8 contest.

http://www.usasciencefestival.org/

The Math Forum learned of these events from tweets by Math in
the News, a service of MathDL, the Mathematical Sciences
Digital Library.