What does "approx due date" mean?

For pre-ordered rugs, we generally display an "approx due date" on our website. These are updated daily with the latest dates available from our supplier. Please visit your rug on our website for the latest dates.
please note this due date is the date we expect our supplier to receive new stock - Please allow our regular delivery times on top of these dates.
Whilst we try our best to provide the most accurate dates possible, please bear in mind it is an approximate date so your order may arrive slightly before, on, or slightly after the date quoted. To see the progress of your order, check your tracking. These due dates are the same for all UK rug stores. if you prefer not to wait for a pre-order or there is a delay please visit your order confirmation page where you can cancel your order for a full refund.