What do Albert Einstein and Pi have in common?

Numbers, basically. Albert Einstein and Pi are both celebrated on March 14th.

Albert Einstein was born in Ulm Germany, on March 14, 1879 and he remained active working for peace and science until his death in 1955.

Have you ever stepped into an elevator and wondered what it would feel like if it suddenly fell out of control? Albert Einstein thought about it a lot. Thinking about space and gravity in this way helped Einstein form his general theory of relativity, one of the most important scientific ideas of the twentieth century. With his wild, bushy white hair, Albert Einstein is the symbol of genius.

Though Albert Einstein is remembered mostly as being a scientific genius, he was also concerned with helping people. During World War II, he assisted many Jews fleeing the Nazis. After the war, the people of Israel asked him to be their president. Einstein declined; he still had unanswered scientific questions to solve. Today, scientists are still hard at work trying to solve some of Einstein's questions. 

Albert Einstein:  Physicist and  Genius,  Revised  Edition
ISBN:  978-0-7660-2838-0

 Pi Day is also celebrated on Einstein's birthday because March 14th (3/14 in month/date format) is the approximate numeric equivalent of Pi in decimal form - 3.14

Doesn't that make for the perfect excuse to celebrate today with a piece of birthday cake or pie?