In that case, they should do the same in the
BNC - my answer was based on their example:
Funny old world, isn't it?
When I (on another thread) use corpora in support of my argument, you can simply ignore them. When a corpus appears to support your case, it appears to become an authority.
We have a native speaker of AmE writing, "I would say "on"; we have a native speaker of AusE writing, "In AusE, and I suspect everywhere else in English-speaking world, we'd say, "on Friday"; and we have a native speaker of BrE writing, " Only
on is correct."
I would not go a far as Rover and state categorically that you are wrong, but I agree with the feeling that 'on' is far and away the more acceptable preposition for native speakers.
You, I, and all the members I have named thus far can think of occasions when a case can be made for 'for' being acceptable. However, as a straightforward answer to sattlesey's original question, SoothingDave's response is one to which few native speakers would object; it is also the most useful one for learners.
As in other threads, you, a native speaker of Polish, appear to think you know better than native speakers.
I will add, before anyone accuses me of smugly dismissing non-native speakers, that I feel strongly that
informed non-native speakers have made invaluable contributions to the understanding of English grammar. Those of us who read in the field have learnt a lot from Christophersen, Declerck, Jespersen, Kruisinga, Poutsma, Sandved, Schibsbye and many others. In UsingEnglish.com, Birdeen's Call (to name but one) has brought wisdom and insight to many threads.
Your contributions in the last few weeks have not yet encouraged me to think that your words carry as much weight as the others I have mentioned.