A temporary disruption of the body’s circadian rhythm occurring during Ramadan, caused by altered sleep patterns, late-night wakefulness, and changes in meal timing between suhoor and iftar. It is typically characterized by daytime fatigue, reduced concentration, and increased nighttime alertness.
Example:
“Ever since Ramadan started, I’ve been dealing with serious Ramadan lag—I’m wide awake at night and exhausted all day.”