During the creation of OLMIS-6398, I noticed that when editing or adding a message a different date format is displayed, compared to the date format on the Notification System screen.
Log in as an administrator and go to System Notification screen.
Create at least one message and check how the date format is displayed.
On the edit screen it is MM/DD/YYYY and on the System Notification screen is DD/MM/YYYY format.
The same date format should be used as on other screens DD/MM/YYYY.