Currently, when you customise the time format in CRM Online, you can only use a colon ???for time separator.
This is not supportive for Japanese users when we also use ???hh)? and ??(mm)? as time seperator which are written in Japanese. ( e.g. 7?10? for 7:10 )

It would be really nice to have ???hh)?and ??(mm)?to be added in Time format options.