You can use this extension for delivery date, Delivery Instructions and Delivery Date extension allows customers to enter "delivery instructions" or "order comments", "delivery date" and "delivery time" during checkout, this information gets saved against order which can be viewed in Magento admin panel under delivery instruction section.
- Convenient date and time slot selection for product delivery
- A special comment box for customers while placing an order
- Configure holiday and vacation period from back-end
- Set minimal and maximum delivery intervals
The following link Magento 2 Delivery Instructions and Delivery Date would be useful.
