the phenomenon of dajjal will be deception by definition of his name and by design. nothing will be for real as it were, merely smoke and mirrors like a magician brings, albeit on a grander scale. the greatest magician of all WILL be dajjal. if one thinks along these lines, then the physical control of the world's rotation in my humble opinion would not be possible for this magician. when we think of time, in essence it really describes distance. for example, an hour in a person's mind encapsulates all they'll do within the hour, or the distance between locations. how far is manchester to birmingham? a time is given but it really describes the distance; the physical quantity. think of it another way; when awliya have karamat that allows them to pray the entire Quran between Asr and Magrib, time hasn't changed at all. the physical rotation of the earth hasn't changed. however, time for them has been stretched and those observing, that it feels like hours have passed yet it's only been an hour. similarly, a day like a month could mean the feats that this magician will achieve not through barakat like the awliya, but deception, which would take a year or years to achieve yet he'll achieve in a day. the people of this world observing these feats where he travels from street to street will seem like an age because of being pre-occupied by his bag of tricks. people will ask "how long has this been, him going from a to b to c etc?" to which people will reply "i don't know but it feels like a year". the day won't have physically been like a year but the things achieved by this magician will make it seem like it's been a year on his first day.... either way, it'll be a crazy time and everyone should pray Surah Kahf regularly on Jummah not to fall for his deception. Allah save the whole of mankind. Allah SWT knows best.