Probably doesn't help with figuring out when to meet, but would maybe help with communicating the time by removing any chance of ambiguity. Or if you're asking

Probably doesn't help with figuring out when to meet, but would maybe help with communicating the time by removing any chance of ambiguity. Or if you're asking e.g. "Does 10.30am work for you?" etc. But really, it's not hard to state the timezone along with the time if there's any chance of confusion.