A natural cycle of daytime activity and rest found in many organisms, including humans.

दिनचर्या लय

English Usage: "The diurnal rhythm of humans often dictates our sleeping patterns."

Hindi Usage: "मनुष्यों की दिनचर्या लय अक्सर हमारे सोने के पैटर्न को निर्धारित करती है।"