Newborn babies celebrate 313 Day with Detroit apparel at DMC hospital Newborns at DMC Hutzel Women’s Hospital wear Detroit, 313 gear on March 13 Tags: DETROIT – The most precious new Detroiters born Saturday were just handed a pretty cool birth date. The Detroit Medical Center’s Hutzel Women’s Hospital welcomed several newborn Detroiters on Saturday, March 13 -- or, better known as 313 Day in the city. To commemorate the doubly-special occasion, Pure Detroit helped dress the babies in appropriate gear for their first photographs, decking them out in Detroit-themed clothes and accessories. You can see photos of the babies below, courtesy of the Detroit Medical Center.