Date format not changing!

jena206 Posts 1 Registration date Monday January 11, 2016 Status Member Last seen January 11, 2016 - Jan 11, 2016 at 01:17 PM
I exported some data from a CRM system and the date exported like:
Dec 9 2015, 3:00 PM

I need to change this to:

I've tried changing using every date format and nothing changes it.
Anyone know how I can get this changed?