Was wondering if anyone knows how to do this or an app which could assist me in doing this
Hello DaisyDreamSg,
Kindly refer the below given link. This is an app which will help you to achieve the requirement ie. the calendar and the time field on your cart page before checkout
https://apps.shopify.com/delivery-date-pro
Kindly check this and let me know if you need any further assistance on the same from me.
Hi @DaisyDreamsSG ,
If you are still interested in, you can check this Delivery Date app:
https://apps.shopify.com/delivery-date-omega
Hope this helps you.