Yes I have checked the settings page and it is already clicked on a option
(Allow to use rule for scheduling).
Here is the following steps that i done.
1.On Ads section create add upload image successfully.
2.On extended restriction section I have checked the (Use the schedule for this ad).
Select Campaign start date:2015-12-14 12:50:00
Campaign End Date:2015-12-14 12:55:00
And my time was 12:40:00
But, when i set the widget section it show the add on 12:42:00.
Please suggest I am missing any steps.
I have also select my timezone at according to my location