The Holy Quran tells Muslims that times of the five daily prayers are fixed and that Muslim must pray at the fixed time.
The guidance in the Holy Quran is meant to allow us to practice what it teaches.
Praying at the correct time is meant to develop in us respect for time because once lost, it does not return. Yet, though we pray at the correct times Muslims are not punctual when it comes to doing other things. If obeying this command does not train us to do everything in our lives at the appointed time then we have missed an important lesson this verse teaches us.