I subscribe to an RSS feed for Show HN posts on Hacker News. People use this category to tell the Hacker News community about their projects. On October 9, 2022, a Hacker News user with the screen-name hitiks shared a small project called Birthday Maker (see archived version of the main link is ever down). The web app contains fields for a name and a birthday message. After filling both fields, the user receives a link to send to the birthday boy or girl. I tested the app with a dummy recipient and message and discovered that it presents a multi-part birthday animation which the recipient cycles through by clicking a button at the bottom of the page. This is a very nice project – I tip my hat to hitiks. If the link is working, you can try using it to wish a real person a happy birthday.