Mannahnin
Scion of Murgen (He/Him)
Sure. "Half past" as a short reference to 30 minutes past the hour when which hour has already been established is both American and British English.IME, this gets shortened to half-past and drops the hour as it can be properly inferred as either in the range of the current, previous, or next hour. If not, the literal ( 2:30 )
It's the specific construction "half [number of hour]" which I don't see/hear used by Americans. Always by Brits or Irish. Not sure about but wouldn't be surprised if it's used in the Commonwealths.