nopCommerce version: 4.20
Steps to reproduce the problem:
Please see attached image.
I don't see a need for Values section when we have date picker as product attribute control type. This is confusing as well.
@atulrungta I can't reproduce this problem. It works fine on a clean installation
@exileDev the previous screenshot was made on our hosted nopCommerce 4.20 website. You can see the front-end here https://nopcommerce420.nopadvance.com/100-physical-gift-card
You already have the back-end screenshot.
Today I did same thing on https://admin-demo.nopcommerce.com/ and it's the same as what I did on our hosted site. Both are almost same. See below:

The Date picker control does not need "Default value" textbox and Values section.
@atulrungta Thanks a lot for reporting, Atul! Fixed
Most helpful comment
@atulrungta Thanks a lot for reporting, Atul! Fixed