https://www.gamespot.com/articles/destiny-2-xur-return-raid-start-time-and-more-conf/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 on September 12, followed by the mysterious Leviathan raid on September 13.

Later in that 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.