About delivery times
Delivery times are when you want the report pack to be emailed to the recipients. You can schedule a report pack to be generated and emailed on a specific date and time, a regular day of the week at a specific time, or on the same day of the month at a specific time.
You can amend delivery times. However, this means that any report packs using this delivery time will be affected. A better practice would be to duplicate the delivery time and adjust accordingly.