Meeting start/end time always set to 01.00

Hi all,
we are facing the following issue with all users except the admin:
1) when a new meeting is created, even if the user sets any given start/end date, the record is saved with start/end date = 01:00:00
2) for already existing meetings with any given start/end date, the use sees start/end date = 01:00:00. Conversely, the admin sees the correct start/end date
3) if the user opens an existing meetings with any given start/end date and modifies any field different from start/end date, the record is saved and the start/end date is overwritten with value 01:00:00.
 In attachment you can see an example: for meeting #49, what sees the Admin, what a user with profile = Project Leader, the database.

Thanks in advance,
Silvia

Hi Arkhanje,
thank you very much for your answer.
Actually yes, we set the time zone = Europe/Brussels, but I didn't know it could cause an issue.
Now we went back to Europe/Paris and seems to work

So we can consider the issue solved

Thanks again,
Silvia