GO Battle League · Scheduled

Great League Mega + Ultra League Mega + Master League Mega

Name: Great League Mega + Ultra League Mega + Master League Mega
Start: 2026-09-01T20:00:00Z
End: 2026-09-08T20:00:00Z

8 PM Sept 1 to 8 PM Sept 8

Sept 1, 2026, 8:00 PM UTC

All September 2026 events

Scheduled. The game's own configuration file dates this exactly, so the window is read rather than predicted.

Source: the game's own rotation table, read at build time.

The game's own rotation table puts Great League Mega, Ultra League Mega, Master League Mega in this window. It rotates on a fixed UTC instant, so unlike the rest of the calendar this one is the same moment everywhere.