- p DAY - LMS celebrated National Pi Day last week. Pi Day is an annual celebration of the mathematical constant p. Pi Day is observed on March 14 since 3, 1, and 4 are the first three significant figures of p. The Lobo Diner students with the help of Mrs Swain made homemade pies. Pictured from left to right are: Adair Miranda, Xavier Castro-Vela, Zalian Williams and volunteer Nancy Swain. (Photo courtesy of Cristal Isaacks).