Should I use "when" or "where" in this sentence? [closed]

I am glad to have met you on Wednesday last week where we discussed...

OR:

I am glad to have met you on Wednesday last week when we discussed...


Since the context identifies the meeting entirely in terms of when it occurred, and not at all in terms of where it was (my office, your office, the pub, wherever), when is far more directly applicable—though where would not be jarringly inappropriate.