If you have at least Tasker version 5.4.6b (you might need to join the beta) you can also directly import this project from here.
This project contains a task called Convert Time.
When ran standalone, this Task will ask you the
Then the task will call the Timezonedb web service and convert the time for you.
- timezone from
- timezone to
It'll look something like this:
You can also call the task from another task (with the Perform Task action) and get the result there.
You can optionally pre-set the time you want to convert in Parameter 1, and the zones in Parameter 2.
If either of these parameters is missing, the task will ask for the missing info.
If you want to add in more time zones, edit the Convert Time task and change the Array Set action (it's action 10) to include the time zones you need!