Don’t forget to reset your clocks tomorrow for springing ahead with Daylight Saving Time.

And absolutely, positively, do not forget your pie, either.

That’s because Sunday is also National Pi Day. Yes, a day to celebrate the number which is “a mathematical constant whose value is the ratio of any circle’s circumference to its diameter in Euclidean space; this is the same value as the ratio of a circle’s area to the square of its radius.” Or so defines Wikipedia. Frankly, it’s been so long since my days of high school geometry that this is enough to make my head spin.

I’d much rather remember that pi equals 3.14. Or March 14 — get it?

Morton’s the Steakhouse wants to put you in the pi mode with, well, pie, of course. And Key Lime, to be exact.

Sunday, at any of its locations, including San Jose and San Francisco, Morton’s will be slices of its Key Lime pie for $3.14 each.

Normally, the slices go for about $10.50 each. That’s a savings of….well, you can do the math.