Excel 2007 : change format of a cell containing a date when X number of days have passed

hi,

hope some one would be kind enough to help, :-) trying to get my head around excel and learn how to use it

1st question, no doubt of many.

i am using Excel 2007 and want to change the colour of a cell when the date in the cell has passed a set number of days – some body mentioned conditional formatting so I gave a go and would you know it, no joy! I really do not know where to start.

I appreciate this may be simple but any help would be appreciated.

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