Hey,
For those that don't know me, I am one of the admins of the Rise of Berk subreddit and Discord group. I've been playing the game for about 8 years now. A couple years ago, I created a Google Spreadsheet of currently active and future game events based on data I was able to datamine from the game. It shows what dragons are coming up in explorations, collections, Odin's Market, and other events. It also lists the max bags for explorations, your time cost info for collections, and info about the dragons you face in Gauntlets. We have found it super helpful to keep track of and plan for events, so I thought I'd share it here too.
https://docs.google.com/spreadsheets/d/1IX9RVrZOudQ2pVms-L6am7Xi6JS-WkJNWeo4advLS3I/
Let me know if you have any questions