e-Day for the year 2024 is celebrated/observed on Tuesday, February 7th. There are until the next observance.

Take out your TI-87 calculator on e-Day, February 7, and look for the little button that improves logarithmic and exponential functions on a regular basis. While you may not be familiar with e, you are probably familiar with its more renowned relative, pi. In the field of mathematics, e, like pi, is a strangely repeating number. It has an infinite number of decimal points, the first of which is 2.718281828 and continues indefinitely. This holiday is on February 7 because, when rounded to the nearest tenth, the date has the same number of digits as the letter e.

📆 When is e-Day?

This year, e-Day is on February 7th. It is the 1st Tuesday in February; in 2024, it is on Wednesday.

Countdown to e-Day

Did you know: Graduates with degrees in science, technology, engineering, and/or mathematics (i.e., STEM) earn 26% more than their equally educated peers.

You can also learn all fascinating things you didn’t know about and facts about February 7, 2023.

📜 History of e-Day

Later, in 1683, Jacob Bernoulli was formally credited with discovering the analytical gem when he sought to determine the answer to a general logarithmic equation, the answer of which was e. For a short period, Bernoulli’s disciples obscurely termed the number b in their regular contact. That was until 1731, when Leonhard Euler assigned the constant the first letter of his surname and formally declared it the basis of all logarithmic equations. In honor of Euler, the constant is still known as e.

While the origins of e-Day are unknown, and we don’t know how long it’s been observed, we can appreciate the reasoning behind allocating this weight-bearing number to its digit twin. A University of Portland student discovered in 2018 that the numeric date was 2/7/18, which also happens to be the first four digits of the beloved constant. This observation excited analytical minds all over the world, and constant e was arguably more celebrated than ever before as many math-inclined brains analyzed the serendipitous alignment of such a calendar match-up. If you want to become a mathematician, you can find a list of math scholarships on Scholaroo.

☑️ e-Day facts

Gender disparity
Only around a quarter of STEM workers are women.

Not just engineers
STEM encompasses all medical areas, including nursing, surgery, and physical and occupational therapy.

Uneven distribution
Some STEM fields, like medicine and technology, have a lot of skilled applicants, but others, like nuclear engineering, have a serious lack of people.

Things to do on e-Day

Sharpen your mind
Many of us in the adult world haven’t sat down to answer an algebra or calculus problem in decades. Sit down at your desk on e-Day and solve a logarithmic equation using the constant e to brush up on your skills.

Memorize the digits
We’ve all had that one classmate who knows all 100 digits of the constant number pi. This Christmas, show e some love by remembering its numbers as far in advance as you can. This will be a fun game to play with kids or a friendly rivalry to have with friends. Who has the best memory?

Donate a calculator
If the forefathers of e could wish for anything, it would be for more people to fall in love with mathematics’ beautiful lines and structure. High-performance calculators are rather costly, and not every kid in your region will be able to purchase one. Consider contributing a calculator so that someone else can enjoy the e-puzzle.

📅 e-Day Observances

YEAR DATE DAY
2024 February 7 Wednesday
2025 February 7 Friday
2026 February 7 Saturday
2027 February 7 Sunday
2028 February 7 Monday

Explore all February holidays, including Special Interest and other Appreciation holidays.

We will continue to update this page with new information and cool facts about e-Day. So be sure to check back soon.