Maintenance for the week of January 20:
• PC/Mac: No maintenance – January 20
• NA megaservers for maintenance – January 22, 4:00AM EST (9:00 UTC) - 9:00AM EST (14:00 UTC)
• EU megaservers for maintenance – January 22, 9:00 UTC (4:00AM EST) - 14:00 UTC (9:00AM EST)
It won't make a huge difference, tanks spend 99% of their time stationary. If your tank is dancing around the room, no set changes will help him.
Sometimes Warden procs as tank is getting into position which is a bit inconvenient, but it doesn't take long for Warden to re-proc where it should be.