Version 0.123.2 & 1.93.2 will be released between 18:00 - 19:30 in the app store.
? The api will be forced between 9:00 p.m. - 9:30 p.m.
? Between 21:45 - 22:30 there will be changes in the master file as well, as in network traffic.
? By 23:00 the Sinnoh Initials will be in Pokemon GO for the first time.

Eu time