Trying to understand times in Jira using convertToTimeZone

[james]

I'm creating an Automation when an issue is cancelled, whereby the most recent comment is included in an email to a team lead, along with the comment author and comment time. When I use:
{{issue.comments.last.created.mediumDateTime}}, the time is 12 hours out (likely UTC or GMT). As such, I need to convert it to my timezone, so I have been trying:
{{issue.comments.last.created.mediumDateTime.convertToTimeZone("Pacific/Auckland")}}

When I use this, the Automation succeeds, but the time is absent from the output.

How can I get the time the most recent comment was created, and in a user-readable, timezone-appropriate format?

[james · Accepted solution]

I've discovered the answer to my question and am posting it here in case someone else comes across my question later. The date/time should be converted before being formatted, like the following:

{{issue.comments.last.created.convertToTimeZone("Pacific/Auckland").mediumDateTime}}