Here are all the eras in order
The Child Era(1982-1992)
The Tales Era(1992-2008)
The Brony Rise Era(2009-2010)
The Golden Era(2010-2013)
The Silver Era(2013-2017)
The Bronze Era(2018)
The Dark Era(2019-early 2021)
The Brony Renaissance Era(2021-now)
The Future
One of 2 things could happen
Either a Second Golden Era, or a Second Dark Era, depending on how it goes, but I hope to Celestia a second Golden Era comes.