Evey Calendar shows wrong date

The calendar's "current day" highlight is handled automatically by Evey’s system and doesn't have a setting to adjust when it switches over to the next day. So that means, many times in the evening hours, our customers are viewing the calendar on our events page and the wrong day is highlighted! For example, it’s 10 PM EST on May 6 but May 7 is highlighted.

Can there be a way to choose a time zone for the calendar or a way to ensure the calendar does not highlight the next day until 12:01 AM?

Thank you!