These details are available within the checkout page when placing an order.
Next to the Delivery Date picker click "Cut-off times" and you will be shown the delivery days and cut-off times set for this supplier.
If these have not been set, this table will be blank.
If you select a delivery date that is not available an orange exclamation mark will appear.
If you ever need to update the delivery days or cut off times set you can do this at a supplier level.
Please note: Managers and Admins can place orders even if a delivery date has been selected that's not available. But this should only be done if you have contacted the supplier and they have agreed this delivery date.