Check date's format and change its format

Hi all,

I have a text that contain dates and maybe number of chapters that look like a date and I would like to convert the dates in another format if they are valid.

For example, the text

Code:

Today is 2.6.2014 and I read the chapter 32.1.14

should be converted into

Code:

Today is 2/6/2014 and I read the chapter 32.1.14

I know to use the date -d "$date" but I don�t know how to keep the date in a var and then make the replacement.

Do you have any idea?

Thanks for your time.

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