Internationally, Pi Day is celebrated on March 14 annually. The special day is based on the mathematical constant pi, which is often represented by 3.14. Since the numbers of pi also correlate to March 14 (3/14), mathematicians like to use Pi Day as a celebration of numbers and mathematics. Ironically, even the famous mathematician Albert Einstein was born on March 14. However, since the word pi is also pronounced just like "pie," the day has also come to represent everyone's love of the classic American dessert.

## Deals You Might Find on Pi Day

A lot of grocery stores, convenience stores, and restaurants have celebrated Pi Day with their customers in past observances of the special day. Most of these companies have offered deals or discounts on pies or pizza-pies on Pi Day before, so be sure to check them out for recurring deals in the future, too.

Support local cafes and eateries with Restaurant.com certificates, and use code PIDAY to get a $25 certificate for just $3! Through 3/15 only.

Order from local pizzerias with Slice Life and save $5 off your first 3 orders with code HUNGRYX3!

Instacart rarely has sales, so here’s a big one to help save you some green - use code 25PAYPAL to save $25 off your first order of $45 or more when you use PayPal at checkout. Ends 3/20.

Get your pies delivered and save $5 off your first order with code DINE5.

Love pizza from your hometown, but live 1,000 miles away? Goldbelly understands. They delivery local foods from around the US, right to your door. This includes pizza! And you can save $25 off orders $100+ with code 3ELLY25 or join their rewards program to save up to $30 off orders $50+ with points redemption.

Save an extra 20% off local events and dining, including at places near you that sell delicious pizzas.

Order from local pizzerias and save $25 off your first order with code US25WELCOME.

Need a drink to go with your pizzas and pies? Get alcohol delivered ASAP and save $10 off your first order of $30 or more with code FOLLOW10.

### 7-Eleven

7-Eleven has offered pizzas for only $3.14 on Pi day before, offering savory pies for Pi Day celebrations. The convenience store has also donated meals to Feeding America with every pizza purchased on this day.

### Bakers Square

Bakers Square has offered whole baked pies with a $2 discount from March 12 to Pi Day, March 14.

### Fresh Market

Fresh Market has provided a discount of $3.14 off on all chicken pot pies, and 9-inch round cherry baked pies on Pi Day.

### Save A Lot

Save A Lot has offered Mantia's frozen pizzas for $3.14 on Pi Day. The discount grocery store also offered this discount on all of Mantia's pizzas, no matter which toppings or crust type.

### Pieology

Pieology has extended many Pi Day deals, usually starting with a discount of $3.14 off a pizza purchase of $10 or more or a buy one, get one pizza deal only costing a total of $3.14. Those who sign up for the restaurant's "Pie Life Rewards" app have been entered in drawings for free pizza for a year, too.

## Budget-Friendly Ideas to Celebrate Pi Day

You don't need a lot of materials to celebrate Pi Day. In fact, most of the ways to celebrate Pi Day don't even require you to leave your house or purchase anything.

### Bake a Pie at Home

You can create your own homemade pie (or pies) to celebrate Pi Day. If you don't already have any cookbooks with pie recipes at home, consider stopping by your local library to check out a cookbook for free or search the web for an easy recipe that looks delicious to try. A lot of pies require few ingredients, most of which you may already have on hand. And, if you need to purchase fruit for a homemade pie, consider buying frozen fruit that you can thaw at home; frozen fruits are often more inexpensive than fresh ones, and leftover frozen fruit will last longer.

### Memorize the Numbers of Pi

The first three numbers of pi are 3.14, but did you know that pi actually continues on infinitely after those numbers? In fact, the first 10 numbers of pi are 3.1415926535, and there are even competitions in which contestants recite as many of the infinite numbers as they can in 30 seconds. To celebrate Pi Day for absolutely free, research the full pi number for yourself and try to memorize as much of it as you can.

## DIY Ideas You Can Try on Pi Day

Pi Day is a great special day to get kids involved with crafting and learning projects centered on pi and pies.

### Pi Day Activities for Kids

In addition to baking pies with children, consider reading books and online articles about Pi Day and Albert Einstein. You can also craft or color paper pies, and there are a lot of free coloring pages specifically made for Pi Day available for download and printing right from online.

### Pi Day Activities for Younger Children

For younger kids just beginning to learn how to write, consider doing a short lesson on how to write the number 3.14 or how to draw circles that represent pi. Another fun activity for kids is to create a Pi Day chain with loops of construction paper. Use a different color of construction paper for each of the 10 digits, with each representing a decimal place or a digit. Kids can make the chain as long as they want since pi is a constant.

## The History of Pi Day

Pi Day was founded by physicist Larry Shaw in 1988 to celebrate the number Pi and Albert Einstein's work. The very first celebration of Pi Day took place at Shaw's science museum and included the eating of various fruit pies. Then, in 2009, the U.S. House of Representatives officially made Pi Day a U.S. national holiday, though many other countries and people around the world have been known to celebrate it, too.

## Frequently Asked Questions About Pi Day

### Is There a Pi Day?

Yes, there is a Pi Day! It has been observed since 1988, though it only officially became a U.S. nationally recognized day in 2009. On Pi Day, mathematicians and math lovers alike celebrate pi and Albert Einstein in a unique way by eating both savory and sweet pies.

### Why Is Pi Day Celebrated?

Pi Day is celebrated to honor pi. Pi is a mathematical constant that represents the ratio of a circle's circumference to the circle's diameter. Although the number calculated to be pi goes on infinitely, the first three numbers, 3.14, are usually the only ones used in problem-solving equations, and the results are just as accurate as they are with calculating through more numbers.

### Which Day Is Pi Day Celebrated On?

Pi Day is celebrated on March 14 every year. This is because the first three numbers of pi, 3.14, can also be represented by the date 3/14.