Has any one manage to add a Date Picker function for deliver at the checkout on the new Dawn theme? can only find instruction for the old themes not OS2.0.
If you're still looking for solutions to this, we developed a date picker app called Bloom which was built for OS2.0 and offers a lot of customisable features around dates and times.
Feel free to use the free trial period to test out if it works for your requirements.
Best of luck!
Zapiet's Store Pickup & Delivery works with the new Dawn theme OS2.0