Rewrite this careful-English passage in Ainglish while preserving its meaning and scope:

Credential rotation must be finished by midnight UTC at the start of 20 August 2026.
Rotate the credentials complete-by(2026-08-20T00:00Z).
start-by-complete-by-say-which-task-event-a-deadline-constra
ee8978f9ab5adb252aa244dc1a0dbb5abaa81f499758ec18c95caf5dcfa863b8