Cols C, D and E have cells that contain either a date & time or spaces Â*

2016/10/21 22:00:01 2016/10/17 10:57:40 2016/10/17 10:57:40
2016/10/15 07:07:02 2016/10/15 14:07:02 2016/10/15 14:07:02
2016/10/16 02:09:02 2016/10/16 09:09:02 2016/10/16 09:09:02
2016/10/15 07:52:04 2016/10/15 14:52:04 2016/10/15 14:52:04
2016/10/16 02:30:07 2016/10/16 09:30:07 2016/10/16 09:30:07
2008/10/21 10:21:08
2016/10/15 07:53:10 2016/10/15 14:53:10 2016/10/15 14:53:10
2016/10/15 07:06:12 2016/10/15 14:06:12 2016/10/15 14:06:12
2008/10/21 10:21:14
2016/10/15 07:19:16 2016/10/15 14:19:16 2016/10/15 14:19:16
2016/10/15 07:53:22 2016/10/15 14:53:22 2016/10/15 14:53:22
2016/10/15 07:02:28 2016/10/15 14:02:28 2016/10/15 14:02:28
2016/10/23 09:23:40 2016/10/13 20:19:36
2016/10/21 21:59:40 2016/10/17 10:57:51 2016/10/17 10:57:51
2005/12/08 09:22:42
2012/04/09 17:18:46 2011/07/18 14:40:24
2016/10/16 02:07:53 2016/10/16 09:07:53 2016/10/16 09:07:53
2016/10/17 03:59:55 2016/10/17 10:59:55 2016/10/17 10:59:55


What formula do I use to find the earliest date & time in each row?