Htaccess redirect, from /year/month to /blog

[opiates]

I am trying to make some redirects so we don't lose that SEO juice.

I am trying to move our blog structure from:
http://www.domain.com/2015/09/title-of-blog

to:
http://www.domain.com/blog/title-of-blog

I need to do redirects in htaccess from the old structure to the new structure but I can't seem to get it working properly. Here is what I have thus far.

<code>RewriteEngine on
RewriteBase /
RewriteRule ^(.0-9)\/^(.0-9)\$ $1/ [R=301,L]</code>

Any suggestions?

[Mobilio]

Correct code should be:

RewriteEngine On
RewriteBase /
RewriteRule ^[0-9]+/[0-9]+/[0-9]+/(.*)$ blog/$1 [R=301,L]

[sergeystefoglo]

This is the right answer minus a few excess characters.

If the blog structure is domain.com/2015/09/title-of-blog then the correct code would be as follows:

RewriteEngine On
RewriteBase /
RewriteRule ^[0-9]+/[0-9]+/(.*)$ blog/$1 [R=301,L]

This will result in: domain.com/blog/title-of-blog.

In other words, Peter you had it right but you just had a few extra characters (you assumed the specific day was also included in the URL structure). Yours would work perfectly if the URL structure was domain.com/2015/09/02/title-of-blog

Also, if anyone ever wants to test your rewrite rules this is a great tool. http://htaccess.mwl.be/.