I believe that this option was previously available and has now been discontinued. But would it be possible to add a custom message either in the basket or at checkout?
My initial purpose for this is to direct customers who purchase certain items to select the correct delivery option.
It could also be further used to up-sell, send seasons greetings, add reminders - (x amount of shopping days until Christmas - or bank holiday opening hours) - or simply personalise the customers shopping experience.