Currently I'm working on SLA's project, reviewing an issue created this has a Createdate totally different to the SLA First Response. Our team works around the world, also the Time zone in our Jira is New York (GTM-05:00) and the calendar of this SLA has GTM-08:00.
Additionally, "Initial Response" met when an new comment is added to the request and this happens because of there is an automation rule that post a comment immediately when the issues is created, so I understand that both should have the same date.

I'd like to know if this happens regarding with a difference between user's Time Zone and Jira Instance. Any idea? Thanks a lot.