Generating random opening and closing times , entrance time

hi

i would like to generate a list of times for example shop opening time and closing time i was trying with below syntax but no success i want it to import it in mysql database please.

ate(‘01/04/2020 16:00:00’) + hours(random(16, 17) + days(random(1,7)))

Example :
2020-04-01 16:00:00 2020-04-01 22:30:00
2020-04-02 16:00:00 2020-04-02 22:30:00

also generating random entrance times:
Example :
2020-04-01 16:00:00
2020-04-01 16:30:00
2020-04-01 16:20:00
2020-04-01 16:25:00
2020-04-02 16:30:00
2020-04-02 16:30:00
etc
please advice
Thank you