I need from an array decrease 3 hours from it and print in command line again 

the output of the array is:

```
12:29:14 
14:10:26 
14:30:34 
14:35:31 
14:35:10 
11:57:03 
12:49:31 
12:57:09 
11:04:49 
13:06:57 
14:35:34 
14:30:49 
14:34:28 
12:58:02 
14:28:12 
12:29:18 
11:33:23 
12:27:04 
14:35:43 
12:58:46 

```

I am trying with this line, but no use.

```
date2=$(date  -d "${array[@]}" "3 hour ago" +"%H:%M:%S")

```

Could you please help me about it?