Final answer:
Ramadan in Islam is the religious practice that mandates fasting from sunup to sundown for a month. It is one of the Five Pillars of Islam and is a period marked by worship, self-discipline, and fasting from all food and drink.
Step-by-step explanation:
The religious practice that requires a month of fasting from sunup to sundown is Ramadan in Islam. During this holy month, Muslims fast every day until the sun sets. The Islamic fast is intensive, involving abstinence from all food and drink, including water. Fasting during Ramadan is one of the Five Pillars of Islam, which are fundamental acts of worship and devotion in a Muslim's life.
Muslims begin their fast at dawn and break it at sunset, typically with a large meal that includes hydrating foods like fruits and vegetables. This form of worship is meant to bring the faithful closer to God, promote self-discipline, and foster empathy for the less fortunate. The importance of Ramadan can vary depending on the season, with longer daylight hours in summer posing a greater challenge for those who fast.