Also commonly called "military time," that's where the afternoon shift switches to 1200 to 2400, taking care of those pesky a.m./p.m. concerns. And switching your phone is easy. Just go to Settings>Date & Time and check "Use 24-hour format."
Portions of this page are modifications based on work created and shared by the Android Open Source Project
and used according to terms described in the Creative Commons 2.5 Attribution License. AndroidCentral is an independent site
that is not affiliated with or endorsed by Google.