Big Team Challenge will be applying essential database upgrades at 7am / 07:00 UTC (8am / 08:00 BST - Europe/London) on Sunday 6th September 2026.
We expect to be offline briefly for up to 30 minutes, during which time the challenge websites, admin and mobile apps will be unavailable. There will also be a brief interruption to syncing but updates should come through without any changes once the maintenance is complete and participants re-sync from their wearable apps.