Live! Time adjustment

I’m using Piwik 1.6, with “Visitors in Real Time.” It is showing times for another time zone, and I would like to adjust the times shown to coincide with my own time zone.
I’ve tried several ways to change the time including adding - SetEnv TZ “America/New_York” - to my .htaccess, but no joy. Suggestions?

The timezones are updated in the “Settings > Websites” page; Manage Websites - Analytics Platform - Matomo

Thank you.