When Ramadan comes, the gates of Paradise are opened, the gates of Hellfire are closed, and the devils are chained

The Prophet (may Allah's peace and blessings be upon him) informed that when the month of Ramadan comes, three things take place: First: The gates of Paradise are opened, and none of its gates are closed. Second: The gates of Hellfire are closed, and none of its gates are opened. Third: The devils and rebellious jinn are chained, so they cannot reach what they would usually reach outside Ramadan.

All of this is to honor this month and encourage people to increase acts of obedience, such as prayer, charity, remembrance of Allah, recitation of the Qur’an, and other good deeds, as well as refraining from sins and misdeeds.