There’s an easter egg when you post or comment about Harry Potter on Facebook

The social media giant quietly rolled out an easter egg in time for Jun. 26, the day J.K. Rowling first published Harry Potter and the Philosopher’s Stone in 1997 (which Americans will, of course, know as Harry Potter and the Sorcerer’s Stone).

If you post or comment any of these below names, a little wand will appear and magic will erupt across your screen.

  • Harry Potter

  • Slytherin
  • Gryffindor
  • Hufflepuff
  • Ravenclaw

What are you waiting for? Go, have some fun.