Nick here from Shopify.
Great question and for a great reason. The only way you would be able to edit the checkout for a custom message such as this, you would need to be on the Shopify Plus plan. There are a couple of workarounds for this though. The most popular and common workaround is to add a note to the product page description. I completely understand if this is not ideal, but other than going to the Plus Plan this would definitely be your best bet.
Another potential workaround is to add a small note to your Shipping rate details at the check out as seen here.
These are the most cost efficient options for you on this. It might be worth reaching out to a Shopify expert to look into adding something for you as a small task.
If you have any other questions about anything else, please don't hesitate to ask.
All the best, Nick
That's not really helpful at all. I've seen threads on the forums where people have asked similar questions, and Shopify programmers were able to go in and change the code for them. Why is that not a possibility?
I'm so unhappy with Shopify. Right now...my business is fairly small. I don't really have a better option, and therefore will be staying with Shopify. However, I would NEVER recommend it to anyone...and the moment I have a better option...I'll be leaving.
Shopify will assist and make changes when it's possible. In this instance being able to edit the checkout is something which is just not possible unless you are on the Plus plan. It would be the same for any other store not on this Plus plan.
You can add a cusotm message to your cart page, above the checkout button if you wish.
alternatively after checkout on their order status page you can add a custom message stating the estimated delivery.
or change the email notification they recieve to state the estiamted delivery.
You may be restricted by shopify when it comes to the checkout, however this doesn't prevent you from conveying this information to customers at another point in the process.