Search and replace

How to describe a syntax for replacement ?

I wanna reform this 2014/05/01 to that year 2014 month 05 day 01 in my notes. So i wrote beneath :

Find String

([0-9]{4})/([0-9]{2})/([0-9]{2})

replace with

year $1 month $2 day $3

It doesn’t work!
Any1 knows how to tell omnifocus exactly what I need?