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Pride parades for the LGBT community (also known as gay pride parades, pride events and pride festivals) are events celebrating lesbian, gay, bisexual and transgender (LGBT) culture. The events also at times serve as demonstrations for legal rights such as same-sex marriage. Most pride events occur annually and many take place around June to commemorate the Stonewall riots, a pivotal moment in the modern LGBT rights movement.
from:
http://en.wikipedia.org/wiki/Gay_pride_parade