https://www.polygon.com/2018/1/30/16950272/destiny-2-server-maintenance-downtime-update-1-1-2

Destiny 2’s servers are currently offline for a few hours, with a big new patch set to go live later today.

Bungie is conducting maintenance on the servers and preparing for Destiny 2’s first major patch of 2018, which will bring the game to version 1.1.2. Downtime began at 11 a.m. ET and is expected to last until 3 p.m. ET; at noon ET, anybody who’s still playing will be kicked out to the title screen.