لِكُلِّ أُمَّةٍ أَجَلٌ إِذَا جَاءَ أَجَلُهُمْ فَلَا يَسْتَأْخِرُونَ سَاعَةً وَلَا يَسْتَقْدِمُونَ
Every community has an appointed term; when it arrives, they cannot delay it by an hour or bring it forward. (Yūnus 10:49)
The expression an hour emphasizes the certainty of the ordained term. Creatures cannot independently alter a term determined by Allah.