Using a Countdown Counter

Does Prismic have a built-in feature for countdowns?
Or can you recommend solutions or add ons, which are working correctly with Prismic.

I know from other cms systems the option to just enter a expiration date so you can use a countdown counter with a customized styling.

Hello @natascha.knack-zerib, This functionality does not exist in Prismic. It's something you need to create from the front-end of your project. To add numbers to your documents you can use a number field to delimit the first number and then your project will count down from that value.