Consumption of Zinc helps to have less wake-ups in the night. It is an excellent & safe sleep aid; and also has a calming & antidepressant effect.
Zinc supplement, if taken at night will be beneficial for the body in multiple ways. Zinc is involved in the production of at least 300 enzymes, helps in hundreds of body processes, from producing DNA to repairing cells and boosting immune system. The mineral can help to sleep better at night, along with a host of additional benefits.

https://www.hzlindia.com/ask_for_zinc/are-you-suffering-from-sleep-disorder-zinc-can-help-you-have-a-sound-sleep/

Thanks. i will start taking it at night with my Magnesium. i have been taking it in the morning.