Meaning of “when” - Learner’s Dictionary

when

conjunction uk us /wen/
TIME

A2 used to say at what time something happened or will happen:

I found it when I was cleaning out the cupboards.
We'll go when you're ready.
ALTHOUGH

B2 although:

Why are you doing this when I've asked you not to?

(Definition of “when conjunction” from the Cambridge Learner’s Dictionary © Cambridge University Press)