Niris has posted a fantastic Destiny 2 Season of Dawn Calendar. 

You can grab the full sized image from Niris.tv

Season of Dawn will begin with the server reset on December 10th, 2019.   

Season of Dawn Pass owners will have access to a new PVE mode called The Sundial and extra goodies as they level through the season pass. 

All players will have access to a new Seasonal Artifact, The Lantern of Osiris as well as the new Solar Class Updates,  a new PvP mode and more.  

This is the first season pass that isn't part of an expansion.  It will be interesting to see how it all plays out.