What is the purpose of wearing the hijab for Muslim women? How relevant is it to the culture? 

Muslims believe that the same God created all human beings; therefore, they belong to one great brotherhood. 

Prophet Muhammad (SAW) said that; those who keep fast in the month of Ramadan have a big reward. The one who stood for the prayer of Qadar has been forgiven for all of his past sins if he hoped for Allah for his sins. People recite Surah Qadar Dua embodies the power of Night.