Timezone error

I have set the correct timezone on my ubuntu server 18 as well as am running the tzdata package.It is still not working. On the new login email, I am still getting time in UTC and not in my local timezone.
Can you please guide me as to how to set it?

By default the timezone is UTC. I don’t know how to change it.

Yes I know but there were some updates last year which included the tzdata variable in the docker containers.I wanted to how to do it exactly.