Display two clocks in two different time zones in the notification bar
You can achieve this using tasker Play Store Link and a plugin called Text Inject Xposed Repo Link you will need to be rooted and have Xposed installed.
Instructions:

Setup a profile in Tasker that runs every 2 minutes. (Smallest interval)
Set the task to Parse Format Date/Time
Input should be Now.
Output should be h:mm a z
Formatted Variable Name set to whatever you want. Ex. %TimeOffset
Offset should be set to Hours and set the amount of hours needed.
Set a task to set TextInject Variable to the variable setup in previous task. Ex. TimeOffset = %TimeOffset
In TextInject set statusbar time to #TimeOffset and parse as time
Done