S1 off season schedule / any recent insight?

Has anyone finished s1 recently / starting s2 soon or recently started s2. Want to understand what is the latest schedule like for post s1 off season. Understand there is the 4 week celebration. With black market and champions duel plus queens revenge events

But what’s else is there in this 6 /7 week off season? Do we have server vs server warzones and how many? Meteor events / how many when? Anything else