An Era is a type of label that is automatically applied to each submission.

They denote a period of time during which the state of combat is generally stable, meaning no significant combat updates.

New Eras are determined by major game updates, such as significant boss and skill releases, as well as major combat updates.

You can think of Eras as commencing after one of these updates - for example Post-GWD2 and Post-Necromancy.

The Leaderboards page allows you to filter records to those achieved prior to a selected Era.