How to make Sharepoint calendar reflect individual user timezone?

Our timezone by default is Pacific but we have users in Central time and their Sharepoint calendars aren’t reflecting their timezone entered on the calendar. I did a test calendar event where I put 3pm-4pm I would’ve imagined on their end it would be viewed as 4-5pm? That isn’t the case though. I just want to make sure that if I set something on the calendar with an alert they they will get it based on their timezone. As you can see below, I changed the individual who is in Central time to their correct time zone so it isn’t using our region default.

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