WeeWorldClock is a cydia tweak for the Notification Center that enables to show 2 or 3 clocks on timezones you can choose directly from the settings. Both analog and digital clocks are available: in digital case, green dot on your left stands for AM, red on your right for PM.
It is based on WorldClock Plugin for LockInfo (Native) which won’t be available anymore from LockInfo 5 (LIV) due to changes in LI. If you’re a previous owner of a license from that plugin, email me for a free update.
NotificationCenter addons can be configured from the Settings app, in the Notifications panel
Configure options from Settings app