That is because Allah causes the night to enter the day and (22:61)

Almuntakhab Fi Tafsir Alquran Alkarim

This is it, for Allah Who causes the night to lose its character and identity by absorption into the day and causes the day to lose its character and identity by absorption into the night is indeed able to keep His promise and His support to whom He will. And Allah is indeed Samiun (Ominipresent) with unlimited audition and Bassirun (He clearly sees all things)

Tafseer Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

(22:61) So it is *106 because it is Allah Who brings forth the day from the night and the night from the day *107 and He hears everything and sees everything. *108

That is because Allah causes the night to enter the day and meaning

*106) "So it is" (as stated in the preceding paragraph) because Allah is the Ruler of the universe and has the power to give punishments and rewards to those who deserve them.
*107) The fact that "Allah brings forth .........day" is a proof that He is the Master, Sovereign and Ruler of the universe. But the deeper meaning of the verse is that Allah, Who is able to bring forth the light of the day out of the darkness of the night, has the power to bring out the light of the Truth out of the darkness of disbelief and ignorance, and the light of justice out of the darkness of tyranny.
*108) He hears everything and sees everything and is not unaware of anything.
 

That is because Allah causes the night to enter the day and meaning in Urdu

یہ اس لیے کہ رات سے دن اور دن سے رات نکالنے والا اللہ ہی ہے اور وہ سمیع و بصیر ہے