I have a program that outputs data in the format
date, time,field1,field2,field3,fieldn 12/20/14,08:01:53,318.622,0.93712,21.6867,1.1089
the file has many columns which all need to stay the same
The date format is US, however I need non-US ie
date, time,field1,field2,field3,fieldn,.... 20/12/14,08:01:53,318.622,0.93712,21.6867,1.1089,....
What's the easiest way to achieve this? I did a search and there are some examples but not quite my situation. Also looked into the date command, and awk and sed but I don't know enough to make a command. For example this answer using awk looked good, but doesn't do anything on my file.
I'm using Mac so would need commands that work for the versions OSX give.