Desk research against primary sources. Figures are traced to the issuing UAE authority and linked on the page.
Friday and Sunday are the two days worth memorising separately, because they break the otherwise consistent weekday pattern in opposite directions — Friday’s last train runs latest at around 1:00 AM, while Sunday reverts to the same finish as a weekday rather than extending like Saturday does. Assuming every day either extends like a weekend or holds like a weekday is the version of this that catches people out.
The RTA Wojhati app matters more around public holidays and major events than on an ordinary night, since that is when the published schedule is most likely to shift from the standard pattern without much notice elsewhere. Checking it before a late booking is worth doing even if you think you already know the timetable, because the version of the schedule that applies on an event night is the one the app shows, not the one you memorised for a typical Thursday.