"Hello, what time is it?"
Translation:Dia duit, cén t-am é?
It would be cén uair rather than cén huair. In Munster, it would be cá huair
Cén uair? does mean "when?" but I'm not sure that it's used for asking what time it is now - (possibly because uair is a bit imprecise for "clock time", though that might just be béarlachas or just an overly modern attitude to time).