What is the time of day mentioned in the Hadith, and is it the hour of the conquest of Mecca? Was Mecca conquered by night or by day? And what is meant by "idhkhar" (a type of grass)?

The hour mentioned in the noble Hadith is the day of the Conquest of Mecca, and its time is estimated from sunrise until the Asr prayer. During this hour, fighting was permitted, but not the cutting of trees.

As for the 'Idhkir, it is a well-known, good-smelling herb found in the Hijaz, used for roofing houses.