Valid bus pass

Could you possibly tell me what the difference is between these sentences?
1. A bus pass valid for 1 month.
2. A valid bus pass for 1 month.

Neither of those are sentences.

Hi Prediction and welcome to the forums.

I have divided your post into to threads. Please ask unrelated questions in speparate threads.

The first is the natural way to say this.

The second would only work in a very strange context, like "I need a valid bus pass for one month, and then I'll give it back."
The first means that the pass is valid for one month. Probably what you mean.

Again , A bus pass valid for 1 month,
my question is this:valid is an adjective and we must use it before a noun for example: A valid buss pass,,,
but in this we have:A bus pass valid for 1 month!

Quote:

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Originally Posted by Prediction

Again , A bus pass valid for 1 month,
my question is this:valid is an adjective and we must use it before a noun for example: A valid buss pass,,,
but in this we have:A bus pass valid for 1 month!

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A bus pass (that is) valid for 1 month.

Not all bus passes are valid for one month. If that were the case, you could just say "a valid bus pass" and omit the length of time.

"For one month" modifies "valid" so they come together.

Not all adjectives come before the noun.

A valid-for-one-month bus pass. (Not very natural, but actually grammatical.)
A bus pass [that is] valid for one month. (A much more natural way to say this.)

There are milllions of examples of switching the position of the adjective, especially when the adjective requires modification itself: contaminated soil, soil contaminated with PCBs