days

[English4everyone]

Which one is correct and common? maybe both?
a) even / odd days
b) even-numbered / odd-numbered days

[BobSmith]

Context?

[English4everyone]

Any context. I want to know which one is correct grammatically.
For example:
They go shopping on even / even-numbered days.
I visit my BF on odd / odd-numbered days.

[Barb_D]

Either one, I'd say, though I prefer the ones with "numbered" myself.

[5jj]

Both versions are unnatural in my opnion. We don't normally speak of days being odd/even(-numbered).

[Raymott]

Which one is correct and common? maybe both?
a) even / odd days
b) even-numbered / odd-numbered days

Neither is right unless there is some way to ascribe parity to days. In English, we name days. To me, Monday, say, is neither odd nor even.
Do you mean dates? They have number. If you mean dates, you could use either.

But both 'odd' and 'even' have alternative meanings.
"I had a few odd dates last month."

[Barb_D]

I have no problem with "even-numbered days" to mean even-numbered dates. I remember the "gas crisis" of the 70s, when, depending on your license plate number, you could fill up on either even days or odd days. Maybe this is American, but if someone said "I do X on even-numbered days" I'd simply assume he meant the 2nd, the 4th, the 6th, etc.

[Raymott]

I have no problem with "even-numbered days" to mean even-numbered dates. I remember the "gas crisis" of the 70s, when, depending on your license plate number, you could fill up on either even days or odd days. Maybe this is American, but if someone said "I do X on even-numbered days" I'd simply assume he meant the 2nd, the 4th, the 6th, etc.

Yes, that's OK, because it occurred within a context in which it was made clear what "even-numbered days" means.
To me, though, I'd have to ask.

[BobSmith]

Now that I read Barb's reply, I see what is meant, and as a native AmE speaker, days can be odd or even, but without the context, I would have said only dates can have this kind of parity.

Then again, Mondays always do seem a bit odd.

[Raymott]

Then again, Mondays always do seem a bit odd.

I was going to say to say that even Tuesdays can be odd, but that would be a self-contradiction.