I have created an APP that is used to display a list of events that are happening. The app is connected/uses a sharepoint list. These events happen in different time zones. Example: one event today could be taking place in California, event for tomorrow could be taking place in New York, etc... These events have date/times that are discussed/agreed upon and all discussions we use EST.
Issue - Event is created by someone in PST. When viewed by someone in EST - the time displayed changes to reflect their timezone.
What is the best route to get the SharePoint List and/OR the APP to properly display the times as EST for all users regardless of their timezone.
Patch string currently looks like this for the date / time piece (Where StartDateTime is the name of the column in the sharepoint list. This column is currently set in SharePoint as a Date/Time) :
StartDateTime: DateTimeValue('listIU-StartDateTime'.SelectedDate & " " & Time(Value('listIU-TimeHR'.Selected.Value),
Value('listIU-TimeMin'.Selected.Value), 0))
The powerapp screen for submitting/updating fields look like this:

Where the above
Date = 'listIU-StartDateTime'
Hour = 'listIU-TimeHR'
Min = 'listIU-TimeMin'
The screen to view the information simply has ThisItem.StartDateTime and ThisItem.EndDateTime displaying within a gallery.