Ramadan

"It is the month of Ramadan in which the Quran was revealed, a guidance for mankind with clear teachings showing the Right Way and a criterion of truth and falsehood. Therefore, anyone of you who witnesses that month should fast therein, and whoever is ill or upon a journey shall fast a similar number of days later on. God intends your well-being and does not want to put you to hardship. He wants you to complete the prescribed period so that you should glorify His Greatness and render thanks to Him for giving you guidance."The Holy Quran, 2:185