Both live under Show off your launch on Release Radar, and on your game's public page.
Launch badge. A small badge with your launch date for your website, press kit or devlog. Pick dark or light, then Copy code for your website or Copy as Markdown for pages written in Markdown. It updates by itself when your date changes.
Launch card. Your game's page comes with a card showing its name, launch date and how busy its week looks. Copy the link, or share it on X, Bluesky or LinkedIn, and the card shows up in every post, chat and Discord channel.
Tip: set a firm date on Steam first. The badge and card then show your exact launch day.