My clients need to fast for blood tests. sending reminders at night like 10 pm is the only way to remind them effectively.

so I need a reminder at a specific time. Also universal reminder timing doesn't seem effective in my case. as people book at different dates/ time of the day and so I really need a better control on reminders

thanks

Could you please set up the system that allow me to sent reminders to patients twice? For example 48 hours and 12 hours ahead, etc.