Macro to calculate the time difference for each date

[Praveenkumarcg01]

Hello All,

I am new to Excel and macro.
I have a spread sheet which consists of date and time entry in 1 column. I have attached the excel for reference.
I want to calculate the time difference for each date.

Date/Time
1/22/2013
11:04:44 PM
10:46:24 PM
10:37:33 PM
7:06:16 PM
6:25:54 PM
4:18:40 PM
4:17:00 PM
3:58:31 PM
3:54:15 PM
2:13:10 PM
1/21/2013
11:21:27 PM
10:40:58 PM
9:45:11 PM
9:41:41 PM
9:22:52 PM
9:22:49 PM
9:19:12 PM
5:03:39 PM
4:27:39 PM
3:38:36 PM

Thanks for help in advance,
Praveen