When was the Pro League released?

When was the Pro League released, or at least, the idea pitched? I am just wondering because if it was June 1st, it’d be a great Easter Egg that has just been found. On the ticket shop, the ticket on top says “Ju 0601 203” The Ju could mean June and 601 would mean June 1st maybe. Just a coincedence I think, but I thought it was kinda funny

Pro league has been added with update 3.5.0 in July 13 and the first pro event was:

  • Marksman Cup: 14 July - 20 July