TYPO3 Core

The date/time format shown in the TYPO3 backend can be configured as a global configuration:

$GLOBALS['TYPO3_CONF_VARS']['SYS']['ddmmyy'] = 'd-m-y';
$GLOBALS['TYPO3_CONF_VARS']['SYS']['hhmm'] = 'H:i';

However, different BE users prefer different formats. This in particular applies to TYPO3 installations for large enterprises or organizations across the globe. A BE user located in the US likely prefers a different format than a user in Europe. Therefore, a global configuration is not appropriate.

I'd like to have the date/time format configurable on a per-user basis (for example: User -> User Settings -> Backend appearance).