The closest one I could think of -free account sign-up needed-
is the WorldMate Live utility for the BB.
On your PC ->
https://www.worldmatelive.com/li-web/index.jsf
also from the BB Browser here->
http://www.wmlive.com
It has a "
Clocks" feature.
"Home City time" plus 4 separate locations that can be set to different timezones,
among other useful utilities for Travellers.
HTH!