dayjs.tz.setDefault doesn't work as expected.

I am trying to move my project from `momentJS` to `dayJS` & for some reason I need to set the default timezone of user to Toronto. I am setting default timezone to Toronto as below.
`dayjs.tz.setDefault('America/Toronto');`

Now, when I am trying to guess the timezone it is showing me as in `Asia/Calcutta`.
`console.log(dayjs.tz.guess());`

Is there any other way to set the default timezone of user to particular location?
How can I confirm the timezone which I have set for the user?

Start by reviewing the reported dayjs.tz.setDefault('America/Toronto') and dayjs.tz.guess() behavior in the timezone plugin documentation and source. The issue names no file or test, so confirm the intended distinction between setting a default timezone and detecting the environment timezone before identifying a reproducible test and expected result.

Written by the indexing model from the issue text.