Exif Farm - how to edit date and time
1. Right-click selected file and choose "Properties" from the context menu:

2. Select the "Exif Farm" tab in the opened window and click "Edit Exif data":
3. The following window will appear:
4. Click the "Edit" button to edit date and time:
5. The following window will appear:
To set new date, edit the following field:
To set new time, edit the following field:
Please note that the time is used in 24 hour format. This means, if you want to change time to 3 PM, you need to add 12 hours to the "PM" time: 3+12=15. So, you need to enter "15:00:00".
To add several days to current date, use the following field:
First, activate the radio button of this field. To set timestamps for example, 2 days ahead, enter "2":
To add several hours to current time, use the following field:
First, activate the radio button of this field. To set timestamps for example, 7 hours ahead, set the value to 07:00:00:
To subtract several days from current date, use the following field:
First, activate the radio button of this field. To set timestamps for example, 2 days back, enter "2":
To subtract several hours from current time, use the following field:
First, activate the radio button of this field. To set timestamps for example, 7 hours back, set the value to 07:00:00:
6. Click Ok.
Batch editing is available in the Exif Farm Pro version only.