Formula for a button to go back to my Base Calendar

I want to make it easier to go from the interface to my base so I want to make a button on the interface to go back to my Base calendar view. which has a URL of Sign in - Airtable This works if I paste it into a browser. but it changes in the browser to Sign in - Airtable which works great.

However, when I use that same Sign in - Airtable in the button formula, it won’t accept the formula and I cannot figure out why?

Any help would be appreciated.

I didn’t realize it would mask the URL in my text but it is the same as in my screenshot.

You need to put the url in quotes.