Destiny (both versions) is going down for up to 12 hours. This is to prepare for CrossSaves

From Here:
Thursday, June 27, 2019

• 7:00 AM PDT 1400 UTC
  Destiny 1 and 2 will be brought offline for maintenance.
  This is to prepare for Cross Save in Destiny 2 later this fall.
  Maintenance is expected to conclude at 7 PM PDT (0200 UTC).
  Bungie.net and Destiny Companion features will be unavailable on Web, Mobile and Third-Party apps.
  
• 7:00 PM PDT 0200 UTC
  Destiny 1 and 2 maintenance is expected to conclude.
  Bungie.net and Destiny Companion features will be re-enables on Web, Mobile and Third-Party apps.
  Players who encounter issues should report them to the #Help forum.