Yes and No. CBD works with your endocannabinoid system and helps maintain balance within the body. Your biological functions are higher and you are body is working hard to maintain this level of function. The metabolism to hormone production is much different and CBD will directly or indirectly help maintain this balance. At night the metabolism to hormone production is much different again and CBD will help to promote and maintain this balance.
There is no evidence to prove that CBD makes you tired. CBD users and the general industry agree you may feel more relaxed however knocking you off your feet during the day, no.