When I have googled, I have found the below free extension but it hasn't worked for me. https://marketplace.magento.com/rage-delivery-date.html.
Improves the delivery date calendar localization in the checkout. Improves the ...
Try to add the below code inside your input tag: data-validate="{required:true}". like
delivery date options on the checkout page.
Let customers leave comments about the desired delivery options at the checkout . Relieve buyers from product delivery assessment difficulties. Set up beautifully- ...
Offer customers the option to select the desired date and time right on the checkout page. Buyers can choose the preferred delivery arrival dates and specify the ...
Manage and display Estimated Delivery Dates for your shipping methods on the checkout. All-inclusive multi-carrier shipping software for Magento 2 with Free ...
Have three options to choose display Order delivery date whether on Shipping method Section, Review Section on Checkout Page or Product ...
Use FireCheckout page to add delivery date to Magento 2 checkout page. Includes the delivery date and time module with advanced delivery ...
Without adding any extra pages to the checkout process, our Delivery Date and Notice Magento module provides new options for your customers. By filling in ...