All Muslims believe in the Quran.
One verse of the Quran is:
إِنَّ فِي اخْتِلَافِ اللَّيْلِ وَالنَّهَارِ وَمَا خَلَقَ اللَّهُ فِي السَّمَاوَاتِ وَالْأَرْضِ لَآيَاتٍ لِّقَوْمٍ يَتَّقُونَ
Indeed, in the alternation of the night and the day and [in] what Allah has created in the heavens and the earth are signs for a people who fear Him.
بے شک رات اور دن کے بدلنے میں اور جو کچھ اللہ نے آسمانوں اور زمین میں پیدا کیا ہے، ان لوگوں کے لیے نشانیاں ہیں جو پرہیزگاری اختیار کرتے ہیں۔

In this post I will mention the difference between day and night 😉
1. Activeness:
In the daytime humans and birds are active. In the nighttime owls and bats are active.
2. Peace:
In the day time it is hot weather and in case of night we feel cooler and our mind feels peace.
3. Sky:
In daytime the sky’s color is bright and light blueish. In the nighttime the sky color is black and dark blueish.
4. Sun Presence:
The sun is present in the sky at daytime while at nighttime the sun becomes hidden. In the nighttime moon and stars deliver light on the earth’s surface.
5. Working Time:
During the day we do our office work, farmers do agriculture work. All the working activities are usually done during the day. Nighttime is for taking rest and sleeping 😴
Conclusion:
Days and nights are made by God. In the daytime we do work and in the nighttime we do sleep 💤