Currently assignee will receive reminder notification 24 hours before the due date of the assigned task. Users are receiving these reminders at mid of night and they want to receive them in daytime.

Box Relay can set the default due ("time to complete" option) like how many days and hours.
This default due is set automatically based on when the task is started. So for many cases, the reminder will be sent out because the task is started in daytime.

But non-Relay task (General and Approval task) can set only due date from calendar picker, like "June 16". The due is set automatically 23:59 at the date. (23:59 June 16)
It causes that users receive these reminders in mid night and some users will be pinged from their mobile device.

To avoid this inconvenience, please add ability to set time as user like or enterprise wide.