I'm okay with that when the tool makes it clear it's done so, and it's easy to switch to the original TZ.

(I always set CW back to UTC, for consistency)

CloudWatch at least lets you choose in which timezone to display datetimes. Other AWS services don't let you choose and don't even show in which timezone they display datetimes, which is somewhat infuriating to me, when I'm in a hurry anyway and suddenly have to wonder which timezone the shown dates are in.

I also remember that AWS used to display some datetimes in Pacific Standard Time, which is completely useless to somebody outside the US, however I haven't seen that in a while anymore.

Similar to the global language switch I wish the AWS Management Console would allow setting in which timezone to display datetimes globally as well.