Hi ​@Adrienne78371 - Thanks for reaching out!

Dark Mode is not currently an option inside of Calendly, my apologies!

However there is a workaround for some users who need it by enabling a flag inside of your browser. If you use Chrome, you can follow the steps in this document on enabling this: https://www.howtogeek.com/446198/how-to-force-dark-mode-on-every-website-in-google-chrome/#:~:text=To%20find%20it%2C%20type%20chrome,%22Relaunch%22%20to%20relaunch%20Chrome.

This can cause some graphical glitches since its not integrated with the website, but can be a nice workaround for a lot of people.

Let me know if you have any questions!