Cheat sheet: Everything you need to know about Sprint All-Star Race

The 31st running of the NASCAR Sprint All-Star Race takes place Saturday night at Charlotte Motor Speedway (7 p.m. ET, FOX Sports 1).

Here's a quick cheat sheet for everything you need to know about the all-star event and Friday night's preliminary Sprint Showdown (7 p.m., FOX Sports 1).

Sprint Showdown (All times ET)

One round of practice: Friday, Noon-1:40 p.m., FOX Sports 1.

Qualifying: 4:15 p.m., FOX Sports 1.

Two rounds of qualifying: The first round is 20 minutes, with the top 12 advancing to the second round. There will be a seven-minute break after the first round. The second round is five minutes. The fastest single-lap speed will determine starting positions 1-12 in descending order.

Race: 7:15 p.m., FOX Sports 1.

Two segments, 20 laps each. The winner of each segment will advance to the NASCAR Sprint All-Star Race.

The winner of the first segment will report directly to the garage at the conclusion of Lap 20.

All laps (green flag and yellow flag) will be counted during segment 1, but only green flag laps will count during segment 2.

Between segment 1 and 2, there will be a yellow flag at which time teams can pit and may elect to change tires, add fuel and make normal chassis adjustments. Cars pitting will not retain their position on the race track.

Crews will be permitted to work on the cars if the race is stopped due to a red flag. However, all work must be performed on pit road or garage area only.

The winner of the Sprint Fan Vote will be announced in Victory Lane following the conclusion of the Sprint Showdown, and that driver will advance to the NASCAR Sprint All-Star Race.

So, the winners of the two segments and the Sprint Fan vote will all advance to the NASCAR Sprint All-Star Race, which will have a field of 20 cars.

NASCAR Sprint All-Star Race 

One round of practice, Friday, 1:45-3:15 p.m., FOX Sports 1.

Pit Road Practice: Friday, 3:15 p.m.-3:25 p.m., FOX Sports 1.

Qualifying: Saturday, 7:10 p.m., FOX Sports 1.

Qualifying will consist of three timed laps, per car, with a mandatory four-tire pit stop. There will be no pit road speeding penalty enforced for the four-tire pit stop. Aggregate total time will set the starting lineup for the NASCAR Sprint All-Star Race.

A five-second penalty will be enforced for the following violations: too many crew members in contact with the pit service area; crew members over the wall too soon; throwing equipment; removing equipment; uncontrolled tire; running over equipment. Pitting outside the box will be a disqualification.

Race: Saturday, 9 p.m., FOX Sports 1.

The race will consist of five segments, with segments 1 through 4 a total of 25 laps each and segment 5 being 10 laps.

Teams may enter pit road during the yellow flag period between segments 1 through 4, but will not retain their running position.

All laps (green flag and yellow flag) will count during Segments 1 through 4, but only green flag laps will count during segment 5.

The running order at the completion of the fourth segment will be repositioned based on the average finish for the first four segments. Ties in average finish will be broken by finishing position in the fourth segment.

All cars must then enter pit road for a mandatory four-tire pit stop. The order of cars returning to the track will determine the starting order of the fifth segment.

Crews will be permitted to work on the cars if the race is stopped due to a red flag. However, all work must be performed on pit road or garage area only.