How can we understand the sun's rising for a year, a month, or a Friday during the days of the Dajjal? Will this encompass the entire Earth, or is it a sunrise like our current days but for a longer duration? And was this mentioned in the hadith?

"Day" today refers to the period of daylight or a duration of time. In the Hadith (definition) about the Dajjal, the intended "day" is the combined period of night and day (a 24-hour astronomical day). Prayer is performed according to the usual times because the sun's state does not change; rather, time slows down, causing the duration of night and day to lengthen. Scholars have differed in interpreting "a day like a year, a day like a month, and a day like a week." Some have interpreted it allegorically, while others have taken it at its literal meaning, which is the more prevalent view.