Each year on March 4, Phi Mus all around the world celebrate Phi Mu Founders’ Day. The day in 1852 when Mary, Mary and Martha publicly announced the founding of the Philomathean Society, which later became Phi Mu Fraternity.

There is no right or wrong way to celebrate Founders’ Day. While there is an open ritual ceremony that many collegiate and alumnae chapters choose to conduct, in many cases the best celebrations include simply gathering with sisters to celebrate a shared bond in Phi Mu.

This year was no exception. 166 years after the founding of Phi Mu, sisters joined together to celebrate sisterhood.

Here are some photos from a few Founders’ Day Celebrations: