What's changing in the handling time update?
Starting in June,
same-day handling time will be added to the handling time drop-down menu so you can let buyers know when you offer same-day shipping for faster delivery. You'll also have the ability to specify order cut-off time for same-day shipments.
When you list a new item, relist, or revise, you'll see an option for same-day handling time available in the shipping details 'Handling time' section and a link to specify order cut-off time in the shipping preferences section of My eBay. Buyers will see the seller-specified order cut-off time in the Item page under Delivery.
New same-day handling option in shipping details.
New order cut-off time notification for same–day handling on the Item page

Starting the week of May 28, buyers will see a
message on the Item page for extended handling time for all listings with greater than 3 days handling time. Message will include the reason for extended handling time if specified by seller in your
business policies. (If you do not specify a reason in business policies, the Item page will continue to indicate that your item will take longer to ship without providing an exception reason.)
New extended handling time message on Item page
New field in business policies form to specify reason for extended handling time.
Why is eBay making these changes to handling time?
Buyers want to receive their items as quickly as possible. When you specify same-day handling, you'll be able to stand out from the crowd and let your buyers know that you offer same-day shipping. Buyers will also see your specified order cut-off time for same-day shipments on the Item page when they place their orders. The calculated estimated delivery date will also be more accurate and more reflective of your great service.
As a best practice, eBay recommends no more than 3 days handling time for all your listings. For listings with greater than 3 day handling time, specify the reason for extended handling in business policies. Your reason, if specified, will be included in the message alert to buyers on the Item page.
What is the importance of specifying an accurate handling time?
Buyers often base their purchase decision on speed of delivery. When you specify same-day handling and set an order cut-off time, buyers will know their orders can be shipped out on the same day for faster delivery (if placed before order cut-off time) and your delivery date will be estimated more accurately to reflect your great service.
What changes do I need to make?
For items that can be packaged and shipped on the same business day, specify same-day handling when you list, revise, or relist your items.
Specify order cut-off time for same-day handling in the shipping preferences section of My eBay. Order cut-off time applies to all orders with same-day handling option on the eBay site on which you list and will be reflected in the delivery estimates provided to buyers.
Ensure that all other listings have no greater than 3 days handling time. For listings with greater than 3 days handling time, specify the reason for extended handling time in
business policies (launching in late May).
How do you calculate delivery estimates for cross-border transactions?
For cross-border transactions, eBay displays your stated handling time, including same-day with cut-off time, (e.g., "Will usually ship within 1 business day of receiving cleared payment or will usually ship within same business day if the order is placed before 2 pm Eastern Time (excludes weekends and holidays)"), but we will not show an estimated delivery time because of potential delays in customs and differences in shipping services.
How can I change the order cut-off times for my orders?
You can update order cut-off time for listings with same-day handling in the shipping preference section of My eBay. You will also be provided with a link in the handling time section to update order cut-off time when you specify same-day handling using most eBay listing flow or tools.