I'd like it everywhere! Right now it's a mix. If I go to put in a maintenance window it's in 24 hour format. If I click into a monitor and I look at a timeline it's in 12 hour. The graphs are in 24 hour on the same page. Scrolling down I see the down/trouble history record and it's in 12 hour. If I go to Alert Logs it's in 12 hour format.
A simple option to have the whole site in 24 hour and YYYY/MM/DD format (or whatever other choices are common) rather than the random mix we seem to have at the minute.