Nearly 50 years ago, the first gay pride parade was held in New York City to commemorate the first anniversary of the Stonewall riots, demonstrations sparked by a police raid on a gay club that served as the first major protest on behalf of LGBT equal rights.

Philadelphia held its first pride parade in 1972, a celebration that lapsed in subsequent years until 1988, when a parade from the gayborhood to LOVE Park led to a commitment to hold a gay pride parade and festival every June.

>> READ MORE: At Philadelphia's first gay pride march, people were 'jeering at us and booing'

That tradition — PrideDay — celebrated its 30th year Sunday with a 1.5-mile parade from 13th and Locust Streets, past a judging stand at Independence Mall and down to Penn's Landing, where a festival of food, drink, music and dancing kicked off around 1:30 p.m. at the Great Plaza.

Marching with William Way LGBT Community Center, Julia Jewells acknowledges the crowd's approval as he walks down Locust Street.
MICHAEL BRYANT
Marching with William Way LGBT Community Center, Julia Jewells acknowledges the crowd's approval as he walks down Locust Street.
Michael Brown is Venus arising from the clam shell on the float from The Tavern on Camac.
MICHAEL BRYANT
Michael Brown is Venus arising from the clam shell on the float from The Tavern on Camac.
Danielle Adams, left, and Sarah Riley, right, hold hands and wave their flags as they walk, hand in hand, down Locust Street as part of the Chase Pride contingent in the 30th anniversary Gay Pride Day Parade on Sunday June 11, 2018.
MICHAEL BRYANT / Staff Photographer
Danielle Adams, left, and Sarah Riley, right, hold hands and wave their flags as they walk, hand in hand, down Locust Street as part of the Chase Pride contingent in the 30th anniversary Gay Pride Day Parade on Sunday June 11, 2018.
Spectators along Market Street show their to support to the marchers in the 30th anniversary Gay Pride Day Parade on Sunday June 10, 2018.
MICHAEL BRYANT / Staff Photographer
Spectators along Market Street show their to support to the marchers in the 30th anniversary Gay Pride Day Parade on Sunday June 10, 2018.
Members of the Wells Fargo Pride contingent wave rainbow flags and smile at the crowd as they march down Locust Streetduring the 30th anniversary Gay Pride Day Parade on Sunday June 10, 2018.
MICHAEL BRYANT / Staff Photographer
Members of the Wells Fargo Pride contingent wave rainbow flags and smile at the crowd as they march down Locust Streetduring the 30th anniversary Gay Pride Day Parade on Sunday June 10, 2018.
Ashley Daniels, of T-Mobile, wears a balloon book bag as she passes out pink T-Mobile sweatbands prior to the start of the 30th Anniversary Gay Pride Day Parade on Sunday, June 10, 2018.
MICHAEL BRYANT / Staff Photographer
Ashley Daniels, of T-Mobile, wears a balloon book bag as she passes out pink T-Mobile sweatbands prior to the start of the 30th Anniversary Gay Pride Day Parade on Sunday, June 10, 2018.
Riders on the Urban Outfitters Pride float are showered with confetti as they ride down Locust Street on Sunday June 10, 2018, as part of the 30th anniversary of Gay Pride Day Parade.
MICHAEL BRYANT / Staff Photographer
Riders on the Urban Outfitters Pride float are showered with confetti as they ride down Locust Street on Sunday June 10, 2018, as part of the 30th anniversary of Gay Pride Day Parade.

Similar celebrations filled streets and parks in cities across the country and world.

Next up by Philly Pride Presents: OutFest on Oct. 9.