- May 7:
- May 12:
- Between May 12 and May 16:
- May 15: Goku finally recovers from the Heart Virus thanks to the Heart Medicine Future Trunks brought him from his time. He tells the others of the Hyperbolic Time Chamber, and Vegeta and Future Trunks enter it to train.
- May 16: Android 17 and Android 18 are absorbed by Cell.
- May 17: Cell announces the Cell Games. Goku and Gohan exit the Hyperbolic Time Chamber, and Piccolo enters it.
- Cooler is killed when Vegeta crushes the Big Gete Star's core chip (movie only).
- Paragus is crushed to death in his Attack Ball by Broly, and soon after, Broly is defeated by Goku. New Planet Vegeta is destroyed in the progress. (movie only).
- Majin Ozotto is killed (video game only)
- The events of Plan to Eradicate the Saiyans happen (video game/movie only).
- Dr. Lychee begins his attack on Earth in order to eradicate the remaining Saiyans by using an army of monsters, setting up Destron Gas Generators, and by having his supercomputer Hatchiyack revive several powerful fighters as Ghost Warriors
- Raichi's monsters and the Ghost Warriors are defeated, and the Destron Gas is stopped. Ghost Frieza blows up Bunbuku Island, killing everyone on the island, including Mr. Satan. The Z-Fighters collect the Dragon Balls to bring back the island and everyone who was on it.
- The Z Fighters go through space, eventually arriving at the Dark Planet. They fight and kill Dr. Raichi and Hatchiyack.
- Frieza is revived. He battles the Dragon Team again and is destroyed by the Spirit Bomb (cinematic only).
- May 26: The Cell Games begin
- Android 16 is destroyed by Cell.
- The Cell Juniors are created by Cell, and then killed by Super Saiyan 2 Gohan.
- Goku, King Kai, Bubbles, Gregory and Android 17 are all killed when Semi-Perfect Cell self destructs.
- Future Trunks is killed by Cell in his Super Perfect Form using a Full Power Death Beam.
- Super Perfect Cell is defeated and killed by Super Saiyan 2 Gohan.
- Mr. Satan takes the credit for Cell's defeat and is hailed as a hero, becoming viewed as the Savior of the World.
- Bojack is killed by Gohan (movie only) and Mr. Satan once again takes credit for the villain's defeat.
- Goten is born.
- Future Dr. Gero is killed by Future Android 18.
- May 12:
- Future Pilaf, Future Shu and Future Mai gather the Earth Dragon Balls and summon Future Shenron to wish for their youth to be restored, but end up being reverted back into babies after they botch the wish.
- Future Piccolo is killed by Future 18 right after the Future Pilaf Gang's wish is made, resulting in the death of Future Kami and the Earth Dragon Balls' destruction.
- The Androids kill all of the Dragon Team except for Future Gohan and Future Trunks.
- Perfect Cell, Cell Juniors and Mr. Satan are empowered by Towa's Dark Magic, becoming Dark Perfect Cell, Dark Cell Juniors and Dark Mr. Satan. Dark Mr. Satan kills Goku and Dark Perfect Cell and two Dark Cell Juniors use their own version of the Father-Son Kamehameha to vaporize Gohan.
- The Future Warrior arrives in Age 767 and saves Mr. Satan from being killed by Dark Cell by humorously kicking him out of the ring. The Future Warrior is tasked by Future Trunks in the Time Nest to defend Mr. Satan and they manage to do so until Mr. Satan attacks Cell and is backhanded by him into a nearby mountain. Mr. Satan survives and that part of the timeline is restored.
- Towa uses her Dark Magic to take control of Mr. Satan, turning him into Dark Mr. Satan, granting him the ability to fly and use Ki Blasts. Meanwhile, Goku steps up to face Dark Cell.
- The Future Warrior defeats Dark Mr. Satan, only for him to be revived by Towa's Dark Magic, transferring Mira's energy into Mr. Satan. Meanwhile, Cell destroys the ring and removes the out-of-bounds rule from the Cell Games.
- Dark Mr. Satan is finally defeated and returned to normal by the Future Warrior, while Goku forfeits and announces Gohan as the one who will defeat Cell. Gohan steps up to fight Dark Cell.
- Trying to anger Gohan, Dark Cell unleashes the Dark Cell Juniors on the Future Warrior and the Z-Fighters.
- Towa uses her Dark Magic on Gohan, allowing him transform into Super Saiyan 2 without Android 16's words of encouragement and death. However, the Dark Magic prevents Gohan from killing Dark Cell. Meanwhile, the Future Warrior learns that Future Trunks has discovered Mira and Towa's location and defeats the rest of the Cell Juniors.
- The Future Warrior confronts Mira and Towa. The Warrior is later joined by Future Trunks, who transforms into a Super Saiyan to help him fight Mira. Mira takes on both the Warrior and Future Trunks, while Towa goes off to fulfil some sort of plan of hers.
- After a hard-fought battle, the Future Warrior and Super Saiyan Trunks defeat Mira. However, Mira gets back up, revealing he was holding back. Towa returns and reveals that her plan to remove the Dark Magic controlling Gohan, taking away his Dark Super Saiyan 2 form, had succeeded. This occurs shortly after Cell's return from his self-destruction and Goku's sacrifice, which results Gohan being weakened and left to face Dark Super Perfect Cell in his Super Saiyan Full Power form. With their work done, Towa and Mira leave Age 767.
- The Future Warrior returns to the Cell Games and assists Super Saiyan Gohan against Dark Super Perfect Cell in order to restore the timeline.
- Eventually, the timeline is restored and Super Saiyan 2 Gohan, with spiritual assistance from Goku in the Other World, destroys Cell with the Father-Son Kamehameha. The Future Warrior returns to the Time Nest.
- The Two-Star Dark Dragon Ball, having traveled through time and space, finds itself having merged with Xeno Cell during the Cell Games. Having been empowered by the ball, Xeno Cell is able to defeat all of Earth's warriors, including Gohan. The Time Patrol, consisting of Xeno Trunks and Xeno Vegeta, head to this period in an attempt to correct history. Xeno Vegeta easily defeats Xeno Cell but, before he can finish him off, he is ambushed by the Demon God Gravy. Xeno Trunks and Xeno Vegeta fuse to become Xeno Vegeks as Putine, one of Gravy's comrades, uses her magic to transform Xeno Cell into Cell-X. Getting in the way of Xeno Vegeks and Gravy's battle, the two combine blasts to finish Xeno Cell off for good. Having used up his power, Xeno Vegeks defuses back into Xeno Trunks and Xeno Vegeta once more. As Gravy goes in to finish them off, Chronoa uses her power to teleport her allies away.
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