All times are eastern/pacific and based on the night an Adult Swim block starts, so if something is shown as "12:30am on the night of August 28th" it technically airs on August 29th.
This schedule is maintained by The Mantis-Eye Experiment using Adult Swim's official schedules and so it may not always be 100% accurate. You can view Adult Swim's official schedule if you prefer.
You can also watch full episodes of Venture Bros. at Adult Swim's Venture Bros. video page. Some episodes may require cable provider login to watch.