When did you last play?
Official sources
The Catch Up history covers ban, rules and format announcements Wizards published in dated articles, complete from January 2019. These links go to the original sources.
Your deck today
Legality checks answer one question: is this card or deck legal right now? They are not a record of legality changes over time. A card that was banned and later unbanned shows only its status now, and a deck that is legal today says nothing about whether it was legal last season. For changes across a period, use the ban and rules history on this page.
Check current legality