﴿ لَمَجْمُوعُونَ إِلَىٰ مِيقَٰتِ يَوْمٍۢ مَّعْلُومٍۢ ﴾

“will indeed be gathered together at an appointed time on a Day known [only to God]:”

Will all be brought together to the tryst of an appointed day) a well-known day, which is the Day of Judgement, whereby the people of old and the people of later times will be brought all together.