Don't you believe it, they can go to the UK for their big OE, in their 20s, get the idea to do an E.T. and "phone home"
The phone rings, at 1 - 2 am, a groggy hand picks up the receiver and brings it where the ear might be, not too sure where it is, it is dark, and still asleep.
A cultured voice asks "Will you accept a collect call from England?
Ah, What???? , too late, it is connected, and a bright, cheery voice spends the next 1/2 to 3/4 of an hour bringing you up to date with what they have been up to.
2 kids did their big OE, and neither of them thought of time difference, they just wanted to update the oldies [who didn't really mind, but still pull their legs over it now and then when the chance pops up.