Have you looked at the Date Format within the Date/Time group
Table 6-1 Date/Time Group Configuration Settings
Enter the name that you want to assign to the new date/time group.
From the drop-down list box, choose the time zone for the group that you are adding.
The default setting for new Cisco Unified Communications Manager installations equals (GMT) Monrovia, Casablanca.
If you upgrade from a compatible Cisco Unified Communications Manager release and you use "local time zone of Communications Manager" in the configuration, the Cisco Unified Communications Manager database determines the appropriate time zone for the database server and then displays that time zone as replacement for the Communications Manager time zone.
Choose the separator character to use between the date fields.
Choose the date format for the date that displays on the Cisco Unified IP Phones.
Choose a 12-hour or 24-hour time format.
Selected Phone NTP References (ordered by highest priority)
To ensure that a phone that is running SIP gets its date and time configuration from an NTP server, add the phone NTP reference(s) to the date/time group. To add a phone NTP reference to the date/time group, perform the following tasks:
Only phone NTP references that exist in the Cisco Unified Communications Manager database display. For information on adding a phone NTP reference to Cisco Unified Communications Manager Administration, see the Configuring the Phone NTP References topic.
After the search results display, check the check boxes for the phone NTP references or click Select All.
Click Add Selected.
After you add the phone NTP reference(s) to the date/time group, you can prioritize them, starting with the first reference that you want the phone to contact. For example, to move a reference to the top of the list, highlight the entry in the pane and click the Up arrow. To move a reference to the bottom of the list, highlight the entry in the pane and click the Down arrow.
Tip : To remove a phone NTP reference from the date/time group, highlight the server in the pane and click Remove Phone NTP References. Removing the phone NTP reference from the date/time group does not remove the phone NTP reference from the Cisco Unified Communications Manager database.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.