The estimated delivery date shown on your listings is based on the time it takes you to pack and ship items (your handling time), and the delivery or courier services you offer.
Weekend and holiday deliveries
Weekends and holidays aren't included in estimated delivery dates, even though some carriers deliver on weekends.
A buyer may contact you if they specifically need a weekend delivery, or want a faster delivery option. If they're willing to pay any difference in cost, it's up to you whether to accept their request.
Express delivery on eBay
To appeal to buyers who need items quickly, consider adding express delivery services, such as overnight, next-day, or same-day delivery to your listing.
To offer express delivery, go to the Shipping details section when creating a listing, and choose your preferred carrier(s) from the Services dropdown menu.