You can choose a later delivery date than you have been given for any order delivered by the courier Guisnel without any extra charge.
You just need to click on Not available? Change your delivery window during the Delivery phase of the order validation, then select the date that suits you.
Please note, the selected date is not the date of your appointment with the courier. You will be contacted when your order is being processed to set a definite delivery date.
For more information on Guisnel, please see our article here.