And every nation has its appointed term; when their term is reached, neither can they delay it nor can they advance it an hour (or a moment).

Say (O Muhammad ﷺ): "I have no power over any harm or profit to myself except what Allah may will. For every Ummah (a community or a nation), there is a term appointed; when their term is reached, neither can they delay it nor can they advance it an hour (or a moment)." (Tafsir Al-Qurtubi).

Allah is He Who raised the heavens without any pillars that you can see. Then, He Istawa (rose above) the Throne (really in a manner that suits His Majesty). He has subjected the sun and the moon (to continue going round)! Each running (its course) for a term appointed. He regulates all affairs, explaining the Ayat (proofs, evidences, verses, lessons, signs, revelations, etc.) in detail, that you may believe with certainty in the meeting with your Lord.

And for every nation We have appointed religious ceremonies, that they may mention the Name of Allah over the beast of cattle that He has given them for food. And your Ilah (God) is One Ilah (God Allah), so you must submit to Him Alone (in Islam). And (O Muhammad ﷺ) give glad tidings to the Mukhbitin [those who obey Allah with humility and are humble from among the true believers of Islamic Monotheism],

See you not (O Muhammad ﷺ) that Allah merges the night into the day (i.e. the decrease in the hours of the night are added in the hours of the day), and merges the day into the night (i.e. the decrease in the hours of day are added in the hours of night), and has subjected the sun and the moon, each running its course for a term appointed; and that Allah is All-Aware of what you do.