Ramadan is observed by fasting.
Ramadan . Fasting is fardh ( obligatory ) for adult Muslims , except those who are suffering from an illness , travelling , are elderly , pregnant , breastfeeding , diabetic , chronically ill or going through menstrual bleeding . Muslims are also instructed to refrain from sinful behavior that may negate the reward of fasting , such as false speech ( insulting , backbiting , cursing , lying , etc. ) and fighting except in self-defense .