https://www.gamespot.com/articles/destiny-2-raid-release-time-when-xur-returns-new-n/1100-6453202/

Destiny 2's launch this week is just the beginning. As you'd expect, there is a lot more content and activities coming, including quite a bit of fresh material this month. As part of Bungie's newest blog post, the studio shared a schedule of Destiny 2's first-month activities, which include the Inverted Spire Nightfall Strike, followed by the mysterious Leviathan raid on September 13 at 10 AM PT/ 1 PM ET / 6 PM BST.

Later in the week, on September 15, Destiny 2's Trials of the Nine event kicks off. On that same day, the Exotic dealer Xur arrives to sell his wares--unfortunately for those expecting to see him today, there's another week to wait. You can see everything coming to Destiny 2 during its first month in the image below.