Will Shipping Rates Calculator+ display the delivery estimated date?
If your store uses real-time shipping rates from Canada Post, FedEx or UPS, the app may display delivery date estimations. Please check the Real-time carriers section in the app preferences to tune them.
Please note that the delivery estimates are provided by your carrier through the Shopify API but they're not a commitment, just an estimation. For that reason, to avoid any confusion with your customers, you may want to reword the text 'Get it by' to 'Approx. estimate delivery on' add some cutoff days to be on the safe side.