Times and time zones
You enter new times by turning on the checkbox to edit the time in the format defined by your Windows™ Regional Options. Alternatively you can turn it off to specify a blank time (even though a time might be displayed).
Procedure
To edit a time:
Click a part of the time to edit it.
Enter the time by using the number keys or the up and down arrow keys. To edit AM or PM, click it and then press the A key to change to AM or P to change to PM.
On saving, the time might be changed for storing and display. For example, 9:08 AM might become 09:08:00.
Time zones are used along with date and time type fields.