Using the Happy Birthday App Block, you can create custom landing pages that introduce your Birthday Club to past, present and potential customers.

See this in action on our own example page:

https://happybirthday.email/pages/shopify-birthday-signup-page
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For more details on how to set this up, please see our guide linked below:
​Adding the Happy Birthday app block to your theme

Please get in touch with support if you need any further assistance.