👑 [Jul 2020] Knights of Avalon Challenge Event – Guides, Discussion & Summoning Results

[Guvnor]

Per the Note I made in the OP & quoting from the linked Official SGG Announcement on the topic:

@EmpiresPuzzles

• All recurring Events start on Monday or Thursday, and they are scheduled to start and end at 07:00 AM UTC.
  […]
• Challenge Events will be 12 hours shorter, starting on Thursday instead of Wednesday. Some of the World Energy costs have been adjusted accordingly.