Campaign starts delivering after 5-10 mins after creation same day you created it.
If you want a campaign to end automatically on a certain date, you can open the campaign, and put the end date. We recommend using this function for product launch campaigns and seasonal campaigns.
The date chosen to end the campaign will be the last day the campaign remains active. To illustrate, if you chose April 22, 2019 as the end date, then the campaign will stop on that day at 23:59:59.