Date Picker and Cart Modifications for Shopify Store

I need someone to update a date picker code so that it works with my website. I have some starter js code to work from, but I need changes made to use it. We sell food boxes and we have 3 products. Each food box will be delivered in the morning of the chosen day. Therefor the client need to select the delivery dates for each box. If the client buys 5 boxes, he has to define 5 different delivery dates. As we need time to prepare the boxes, for a next day deliver the client has to submit his order until 4 pm. After 4 pm a next day delivery is not available. (All European time -> MESZ) On weekends and holiday the client has to submit his order until 00.00am for a next day deliver. After 00.00am a next day delivery is not available. Example: to get a delivery on Monday, the client hast to place his order until saturday night. On sunday, the client can only select delivery dates from Tuesday. We only deliver on weekday. We do not deliver on weekends and holidays, therefor these days can not be selected. Also, I would like to modify the cart, so that the customer can see the delivery date of each item. Please include the word "GoPro" in your proposal so that I know you've read the entire brief. Final code should: - have user pick a delivery for each article (each piece!) from a calendar drop down - include the selected information in the 'order notes' section after order has been placed. - lock weekends and holidays - lock "next day" after 4pm. The website is [login to view URL], feel free to check it out. I will provide the code for my shopping cart once I have selected a provider.