Set Ununtu time using web server

Question

I am using nanopi board/ Ubuntu TLS 20.04 focal

have a simpoole site using nginx web server

inside a the page there is a button to apply new time to the system using "exec(date --set='')"

I have tried all possible configuration to setup using sudo and even add www-data ALL:nonpassword to visudo

then grant folder /var/www/html access www-data:www-data and permission 777

but I cannot modfiy the system time or restart it using my website

even I can do thesse operations using command promot.

please help.!