Half past one, two, etc.
Definition 1 of 1

Time Precision
Used when exact minutes are less important, to give a rough time within the hour.

Let's catch up at half past four.
Polite Vagueness
Indicates a polite appointment time, without insisting on punctuality.

The ceremony starts at half past nine.
Casual Context
Common in informal settings, among friends or family gatherings.

We're having lunch around half past twelve.
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