Set your site's time zone and time format
Your site's time zone and 12- or 24-hour clock set how schedules and messages show times for everyone who hasn't chosen their own.
Who can do this: anyone with the Modify Site Settings permission (an Administrative - Common permission). Of the standard roles, only the Administrative - Common Administrator role has it.
- Go to Administration > Site Administration > Regional Preferences.
- Pick your organization's location from Site's Default Time Zone. The main US time zones are at the top, and the rest are grouped by region, then city. You can type to filter the list.
- Optional: check Force all users to use site time zone setting to put everyone on the site's time zone. On a tour, this keeps everyone reading the schedule in the venue's local time.
- Pick a Site's Default Time Format, 12 hour or 24 hour. It applies on the site and in the messages and reports it sends.
- Click Save Changes.
People can choose their own time format in their profile, and theirs wins over the site's. They can choose their own time zone too, unless you force the site's.