We take care of all of that!
When view a Upvio booking page, we automatically detect your timezone based on your computer's settings. This also adjusts your country code for the phone number.
Of-course, this can be overridden if you change your time clock or use the dropdown on the right hand side.
All times are converted into the business times and appear as relative times to both the customer and the business / staff so there is no confusion.
NOTE: As of May 2021 you can now turn off the timezone field from displaying on your booking page. This can be found in your booking settings.