Gay Uncle's Day or Guncle's Day
Gay Uncle's Day or Guncle's Day is held on August 9. It is celebrated on the second Sunday in August. This event in the first decade of the month August is annual. 
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The holiday was conceived and first promoted Facebook user, C.J. Hatter, but received visual attention online when former Rugby player, Simon Dunn, posted on his Instagram asking people if they wanted to celebrate "Gay Uncle's Day" on Sunday, August 14.
Source: wikipedia.org
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