Some Flow cards include a time field, such as “The time is 12:00.” In the Homey Web App, the time format displayed depends on your device or browser’s regional settings, not a Homey setting
Windows
Open Settings and go to Language & region. The Country or region setting controls the time format. You can override it using the Regional format option. Restart your PC for changes to take effect.
If Chrome still shows the wrong format, open Chrome settings and change the display language. English and English (United States) use the 12-hour format. English (United Kingdom) uses a 24-hour format.
macOS
Open System Settings and go to Language & Region. The first language in your preferred languages list determines the time format. Restart your Mac for changes to take effect.