Ability to Adjust Carrier Generated Estimated Delivery Dates in Checkout?

[Jamie_Flynt]

Has anyone discovered how to adjust or change carrier delivery estimates that are auto generated and displayed in checkout by the carrier? We are having issues with our USPS integration not properly displaying estimated delivery dates in checkout because we are unable to factor in our in house processing time that is dynamic and can change day to day.

Screenshot of what I am talking about above.

Any responses are welcome.

[Jamie_Flynt]

I should also note I after quite a bit of research and time with Shopify Support there appears to be no built in way to dynamically adjust these.

However, I refuse to be think we are the only store with this issue. So even hacky answers would be great.