Notepad++ 6.5 regex replace with same regex

Question

I want to replace a regex based on a date string with the same one and a new line. The problem is that when I write the sintax like this:

Replace with : (\1)\n

Or like this :

Replace with: ($1)\n

It only replaces it with a new line, instead of replacing it with what it finds and a new line. My regex is this:

(?:0[1-9]|[12][0-9]|3[01])/(?:0[1-9]|1[0-2])/(?:19\d\d|20\d\d)

Can you help me? Or tell me what am I doing wrong?

edit:

This is a string example of what I need:

03/12/2010 lots of text 05/12/2009 lots of text lots of text 13/09/2008 lots of text lots of text lots of text 23/09/2007 lots of text 20/04/2010 lots of text

I need it to look like this:

  03/12/2010 lots of text 
  05/12/2009 lots of text lots of text 
  13/09/2008 lots of text lots of text lots of text 
  23/09/2007 lots of text 
  20/04/2010 lots of text

Answer 1

You are not capturing anything with that regex, just simply matching.

In that case, you would want to put the match back, so you can use $0 or \0 for that:

Replace with:

$0\n