Show Two Time Zones on Y Axis Label Using Custom Format Code?

[Harvy Woods]

I need to make my Y axis in a graph show the time in HH:MM (local) format as well as HH:MM +/- offset for another timezone. Form example: 09:00 EST 06:00 PST Is there some sort of custom format code I could use? Can I do somehow take the standard format code: [$-400]hh:mm:ss AM/PM;@ And do something like the following to adjust for the time difference? [$-400]hh(-3):mm:ss AM/PM;@