I assume most of you are subbed to r/thesilphroad and r/pokemongo, but just in case any are out of the loop, I made this post.

Articuno is available from now until July 31. Moltres from July 31 - August 7 and Zapdos from August 7 - 14. Lugia is supposedly permanent.

I don't think the exact time of the switches is known. It is possible that both Articuno and Moltres will be available on Monday, or it is possible that Articuno will be available on Sunday but not on Monday. (Until can be a kind of vague word in my opinion.) Correct me if I am wrong please.

Source: https://twitter.com/PokemonGoApp/status/890005094976167937

(My work bans the official pokemon go website but doesn't ban twitter. Go figure.)

Edit: Oh and also, the Discord is very useful for raiding. There is also a Google Hangout but it recently filled up at 150 people. We are trying to devote the hangout to downtown raids. If you use the hangout, please leave the group when you are not actively raiding out of courtesy to others.