Looking for a simple 'Countdown / Days Until' Calendar Card

[alfista (Jason)]

Hi! I’m in the process of moving 10 years of work in another platform to HA, trying to spend as little time as possible creating code/yaml from scratch as the to do list is long.

One of the first things I am trying to do is get a ‘Countdown Card’ for significant calendar events displayed on the dashboard, ideally with a background image. Like this:

I’ve found this thread, which is a little older and requires some navigating of GitHub issues and one dead link that sounded promising.

Day Countdown card

For my first project, I’ve created a reasonably simple card that counts down the days to a given date. You can use it for birthdays, anniversaries, upcoming vacations, holidays - any date you wish. It has an optional icon with three possible sizes. You can add a link to the icon to take you to some relevant page. It’s only one Javascript file, and you can snag it from my repo: https://github.com/bundito/day-countdown As an example, here’s the card with the icon set to the “medium” size. [medi…

I worry about trying to apply code from old threads as it often leads to learning that something changed in the core system that I have to figure out. I’ve spent more time searching than I care to admit. Do I need Mushroom? I didn’t see a good example while skimming those threads.
Can someone point me to a good solution?