symb dates
4 BLK 01/03/2014 09:00:00
0 BBR 02/06/2014 09:00:00
21 HZ 02/06/2014 09:00:00
24 OMNI 02/07/2014 09:00:00
31 NOTE
You can use pandas.to_datetime and use the format argument then sort it.
>> df['date'] = pd.to_datetime(df['date'], format='%m/%d/%Y %H:%M:%S')
>> df.sort('date')
date symb
0 2014-01-03 09:00:00 BLK
1 2014-02-06 09:00:00 BBR
2 2014-02-06 09:00:00 HZ
3 2014-02-07 09:00:00 OMNI
4 2014-03-04 09:00:00 NOTE
6 2014-04-07 09:00:00 RBY
5 2016-03-04 09:00:00 AMP