Can the app add the dispatch date to Shopify's order confirmation email?

No. Shopify doesn't let apps change its order confirmation email. Instead, we add a note to the thank-you page and the order status page, which customers can come back to at any time.

What customers see

On the thank-you and order status pages, for orders placed during a keep-selling closure: "Thanks! We're away, so this ships from {dispatch_date}."

Steps

1. Open the closure in Closures.
2. Under Where to show it, make sure Thank-you and order status note (keep selling) is ticked.
3. Optional: edit Order status note (keep selling) under Text for this closure.
4. Click Save.

Good to know

• The note only shows for orders placed while a keep-selling closure is active. It never shows in block-checkout mode.
• The note shows even if the order only has products you've kept open. We can't tell which products are in the order on these pages.
• If the closure has no dispatch date (for example Close store now with no reopen date), the note says "Thanks! We're away, so this will ship as soon as we're back."
• The order confirmation email links to the order status page, so customers can find the note there.
• You can edit Shopify's notification templates yourself in Settings → Notifications. The app can't do this for you, and you'd need to change it back afterwards.