When does new period opens for data entry


Do new data entry period open exactly at 00:00 server time?

I have a weekly dataset, and users in Iraq are complaining that they are not able to enter data in a week until 12 noon their time. The server data in About DHIS2 section displays only 3 hr difference between Iraq and the server time, so I am wondering why do they not see a new week until Monday noon.

Thank you