Normally the game drives leave before sunrise between 5 am and 6 am depending on the time of the year and this is called the early morning game drive. Breakfast is served on arrival back at the lodge.
Then you would go out on a late afternoon game or evening game drive which normally leaves between 3 and 4 pm and returns after sunset around 7 pm. Dinner is served back on arrival at the lodges.
The midday heat makes it very difficult to see animals so that time is normally spent at the lodge.