Starts at noon, ends at 3:14:15 or goes on forever ...
Option 4. Eat 'pi' foods. Many creative ways exist to
do this. First, there's the punny approach, like eating pineapple,
pizza, or pine nuts and drinking pina coladas or pineapple juice.
Second, there's the shape approach, like making cookies or pancakes
shaped like pi or making a pie with a pi cut out of the center of
the crust. Of course, whatever you do, Pi Day is simply incomplete
without eating pie, even if you don't feel artistic enough to carve
the pi symbol out of the top.