Date & Time in the same column, needs sorting

Hello,
I hope this one's going to be easy.
Let's take the G column for example. The database I'm working with is generated automatically so I can't help but have the time and date in a single column. The problem is I need to sort the column chronologically or counter-chronologically,and Excel doesn't even see the cells as time or date, I've tried formatting the column but no luck. So I hoped there's an easy way around this. Keep in mind that the actual database is tens of thousands of rows, not sure it's relevant but..
Thanks !