Yess has fantastic automation which allows you to conduct meetings between any timezones. If you want to set your availability, check this article.

If you wish to change your calendar or want to disconnect, then click on the disconnect button present on the right-most side of the calendar option under the availability tab.

OR

Click on the Disconnect button to confirm once.

You will see that the calendar email will disappear and disconnect will change to Connect

See a few more articles to understand Yess better.