Time Travel

Time Manipulation is the ability to manipulate time for various purposes.

Overview
The user is able to manipulate time to accomplish incredible things such as traveling through time. It has been shown that one can travel to the past by imagining their inner universe and manipulating the particles as well as anti-particles generated in pairs by the user's intense cosmic rays, and making the two types of subatomic particles imitate each other's movements as they move forward and backward in time. After receiving powers from "God", Garou gained the ability to manipulate time and referred to it as the ultimate technique of "his fist". However, as stated by Garou himself, he has not mastered this technique for time travel.

After being defeated by Saitama in their fight, Garou demonstrated this power and asked him to copy and further improve it in order to travel through time, hoping the Caped Baldy would change the "ominous future" that has already happened during their fight. While executing this ability, Garou was killed by "God" who took back his powers in the process, although not before Saitama managed to replicate Garou's ability to manipulate time and use it to successfully travel to the past. Upon returning to the past, Saitama was able to defeat Garou before the cosmic radiation emitted from the Hero Hunter could kill many other heroes present on the surface, thus successfully changing the "ominous future". However, right after defeating Garou, the "future" Saitama was forcibly pulled towards his "past" self in that timeline, causing them to merge and become one, with the now and only Saitama unable to remember what's happened.

Given that Garou mentioned his ability to manipulate time is the power of "God", it is likely that the latter can also use this power, although it is unknown how "God" makes use of it.