Add an order fee based on delivery date

I am attempting to add a fee to the total order amount if the date of delivery is within 24 hours from the date of the order being placed. Currently, my checkout form contains a custom field to input the delivery date to compare against. Any help on this would be greatly appreciated.

20 minutes ago, JSuchar said:

I am attempting to add a fee to the total order amount if the date of delivery is within 24 hours from the date of the order being placed.

It isn't possible to do this automatically. No actions can be taken on the checkout page as it is locked down to prevent custom code running.

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