iOS 17 Tutorial: How to Use 24-Hour Clock on iPhone


Michael Collins

Switching to a 24-hour clock on your iPhone with iOS 17 is a breeze! Simply head into your settings, tap on ‘General’, then ‘Date & Time’, and switch the toggle for ’24-Hour Time’ to the on position. Now your iPhone will display the time in a 24-hour format, also known as military time, making it easier to schedule events and avoid confusion.

Related Video: How to Use 24-Hour Clock on iPhone

Step by Step Tutorial: How to Use 24 Hour Clock on iPhone

Before we dive into the steps, let’s get a bit of context. Switching to a 24-hour clock can help you avoid mix-ups between AM and PM, especially if you’re someone who has a schedule that goes beyond the typical 9-5. It’s also a great way to align with international timekeeping standards if you’re a globetrotter.

Step 1: Open ‘Settings’

Tap on the ‘Settings’ app on your iPhone’s home screen to start the process.

The ‘Settings’ app is where you can customize and change all sorts of things on your iPhone, from your wallpaper to your privacy settings.

Step 2: Tap ‘General’

Scroll down and select ‘General’ to access more specific system settings.

‘General’ is the hub for all major settings that affect the core functions of your iPhone.

Step 3: Select ‘Date & Time’

Find and tap on the ‘Date & Time’ option to change how your iPhone displays the time.

This is where you can also adjust settings like setting your time zone or toggling ‘Set Automatically’ for your date and time.

Step 4: Toggle on ’24-Hour Time’

Switch the toggle next to ’24-Hour Time’ to the on position.

Once you flip this switch, your iPhone will immediately begin displaying the time in a 24-hour format.

After completing these steps, your iPhone will now display the time in a 24-hour format across the entire system. This includes the lock screen, the status bar, and any apps that use the system time.

Tips for Using 24 Hour Clock on iPhone

  • Familiarize yourself with the 24-hour format; 13:00 is 1 PM, 14:00 is 2 PM, and so on.
  • Remember that there’s no AM or PM indicator in the 24-hour clock.
  • If you use Siri, you can still set alarms or calendar events using AM/PM, and it will automatically convert to 24-hour time.
  • Use the 24-hour clock to easily coordinate with friends or colleagues in different time zones.
  • Check if any of your third-party apps have a separate setting for the time format, as some might not automatically switch to the 24-hour clock.

Frequently Asked Questions

Will changing to a 24-hour clock affect my alarms?

No, your alarms will still go off at the set time, just make sure you’ve set them correctly in the 24-hour format.

Can I change just the Clock app to a 24-hour format?

No, the setting changes the time format system-wide, including the Clock app.

Will the 24-hour clock affect my calendar events?

No, your calendar events will remain at their scheduled times, they’ll just display in the 24-hour format.

If I switch to a 24-hour clock, can I easily switch back to a 12-hour clock?

Yes, just follow the same steps and toggle off the ’24-Hour Time’ switch.

Does the 24-hour clock change how time is displayed in my emails and messages?

Yes, any timestamps within your emails and messages will reflect the 24-hour format.


  1. Open ‘Settings’
  2. Tap ‘General’
  3. Select ‘Date & Time’
  4. Toggle on ’24-Hour Time’


Switching to a 24-hour clock on your iPhone is a simple task that can make a big difference in how you manage your time. Whether you’re a night owl, an early bird, or someone who interacts with people in different time zones, using a 24-hour clock can help keep your schedule straight. iOS 17 makes it easy to adjust this setting, giving you the flexibility to choose a time format that works best for you. Give it a try, and you might just find that it’s a change worth making. And remember, if you ever want to go back to the 12-hour format, it’s just as easy to switch back. Happy scheduling!