Time format not configurable, only 24-hours

Not able to change time format, for example to 12 hours AP/PM.

GLPI support a lot of languages, but it isn't very flexible in setup language formats, for example change 12/24 hours format.

It would be fine to have a option to change time format at least 12/24 hours. Better would be add option to also use custom time format for displayed time.

For example Wordpress use 4 option and one custom: