### Steps to reproduce

_Please write down the steps to reproduce. Try to write down all necessary preconditions (what permissions do you have, are other users involved?). Example:_

1. Login as a user with permissions to manage Begin of the insertionmeetingsEnd of the insertion Begin of the deletion membersEnd of the deletion in project A
2. Begin of the insertionFor this user set the preferred time format to 24h
3. End of the insertion Go to the Begin of the insertionmeetingsEnd of the insertion Begin of the deletion membersEnd of the deletion page Begin of the insertionof project AEnd of the insertion
Begin of the insertion4.End of the insertion Begin of the deletion 3.End of the deletion Create Begin of the insertionNew Meeting
1.End of the insertion Begin of the deletion project 
4.End of the deletion Begin of the insertionHave a look at the start date field (see screenshot): Instead of a 24h format, there is an AM/PM formatEnd of the insertion Begin of the deletion click on "Meetings" menuEnd of the deletion
5. Begin of the insertionExisting meetings are shown correctlyEnd of the insertion Begin of the deletion Create New Meeting 
6. if to edit existing meeting then meetingEnd of the deletion in Begin of the insertiontheEnd of the insertion list Begin of the insertion(see screenshot). However, once I wantEnd of the insertion Begin of the deletion in proper format but Meeting edition for forcedEnd of the deletion to Begin of the insertionedit that meeting I see theEnd of the insertion AM/PM Begin of the insertionformat again (see screenshot)

End of the insertion Begin of the deletion format. (screenshot attached)



End of the deletion ### What is the buggy behavior?

Begin of the deletion _Please describe the bug with as most details as possible. Example:_

End of the deletion * You will see New Meeting dialog with AM/PM format in stead of 24 hours format (screenshot attached).

### What is the expected behavior?

Begin of the deletion _Describe how the application should behave like. Example:_

End of the deletion 1. Time in New Meeting dialog must be in 24 hour format like it configured in locale of Begin of the insertionuser.End of the insertion Begin of the deletion user. End of the deletion

### Begin of the deletion Important note

_Please note that unless you are a contributor to OpenProject, you can no longer edit this bug report after saving. You can still add new comments, but no longer add any new images or other attachments. Please make sure that all necessary information and attachments are added, and the following attributes are set:_

###End of the deletion **Logs**

no needed bug is good visible

### Begin of the deletion Screenshots and other files

_If you have screenshots of the application's bug behavior or other relevant files, please drag them into this place or attach them using the "Files" section._

###End of the deletion Environment information Begin of the deletion

_Please check and fill out the following details to help us identify in what versions and distributions of OpenProject the error occurs_End of the deletion

**OpenProject installation type**

* [ ] Hosted cloud edition
* [ ] Packaged installation
* What distribution?
* [ ] Docker All-in-one container
* [x] Docker-compose installation
* [ ] Other (please specify)

**OpenProject version**

_If you're not running on the cloud edition, please specify the version of OpenProject you're running. Example: v12.1.5_

**Browser**

* [x] Chrome
* [x] Firefox
* [ ] Safari
* [ ] Mobile Safari
* [ ] Other (please specify)

**Language**

All languages affected