The format of Data and Time displayed on the Approval web panel and the Approval History tab depends by the following Jira settings:

Jira default language (System->General configuration->Default language)
Default user time zone (System->General configuration->Default user time zone) and User Time Zone Preference (../secure/ViewProfile.jspa → Preferences → Time Zone)
Complete Date/Time Format (System->Look and Feel->Complete Date/Time Format)

The following examples show how the mentioned settings affects the format of Data and Time displayed on the Approval web panel and on the Approval History Tab.

Example 1

Default language	Deutsch
Default User Time Zone	GMT+01.00 (System Time + 1hour)
Complete Date/Time Format:	h:mm a, MMMMM dd, yy (E.g. 4:55 AM, May 23, 07)

Data/Time Format displayed on the Approval web panel is showed below:

Data/Time Format displayed on the Approval Approval History Tab is showed below:

Example 2

The following screenshots show the date time format displayed on the Approval Panel base upon different Complete Date/Time Format setups.

Complete Date/Time Format

h:mm a, MMMMM dd, yy

Complete Date/Time Format

h:mm a

Complete Date/Time Format

hh 'o''clock' a, zzzz

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