That is an advanced customization for all those , if you want that for your store you can contact me with store details for pricing by email in my forum signature.
For next day availability to become unavailable after a certain time (4.00pm AEST) , bit more complicated see stackoverflow sample
To make weekends unavailable, but an option for us to make SOME weekends available., $.datepicker.noWeekends%20)%3B-,%24.datepicker.noWeekends,-Set%20as%20beforeShowDay)
Nice to see a fellow Aussie here! I’m one of the developers of a delivery date app called Bloom which has options for exactly what you’re asking. You can change the date format to DD/MM/YYYY, set cut-off times for next-day delivery and blockout specific days/dates, plus a bunch more.
If you’re interested in trying it out, we have a 14-day free trial so you can see if it’ll work for you.
Let me know if you had any questions or wanted help getting set up.
We have an app called Store Pickup & Delivery that can cover all your needs, date format, cut off times, blackout dates and much more that integrates on the Shopify platform.