@Soyerski123 Fitbit doesn't release firmware on a calendar schedule. It release firmware when it has an update ready. Updates can add new feature and fix bugs. Releases are announced here in a pinned blue banner post at the top of the forum. Sometimes there are news articles in sites like Android Central, Wareable, and others.
Laurie | Maryland
Sense 2, Luxe, Aria 2 | iOS | Mac OS
Take a look at the Fitbit help site for further assistance and information.