Huge cleanup

 Hi,

I want to make a huge cleanup in several columns. On day column I want to change characters like "00", "/", "32", "000", etc, into "".

On month, something like what. In year, I need to change characters like where year > 2000 to "".

Is it posible to make something like this? I can see I can make one by one, without the formula.

Thank you

Edgard