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

Switching to a 24-hour clock on your iPhone can be done in a few simple steps. To accomplish this, you’ll need to access the “Date & Time” settings on your device. Once there, you’ll switch off the “24-Hour Time” option. And voilà, your iPhone will display the time in a 24-hour format instead of the 12-hour format.

After you complete the action, your iPhone will display time in a 24-hour format, commonly known as military time, across all apps and features that show the time.

You can also watch this video about how to use the 24 hour clock on an iPhone for more information.


Are you tired of the confusion between AM and PM when checking the time on your iPhone? Maybe you’re someone who prefers the 24-hour clock format (also known as military time) for its clarity and precision. Well, you’re in luck because iOS 17 has got you covered! This update allows users to switch their iPhone’s clock display to a 24-hour format easily.

This topic is significant for anyone who relies on their iPhone for timekeeping, which is pretty much everyone. Whether you’re a professional needing accurate time records, someone who frequently travels across time zones, or simply someone who prefers the 24-hour format, this feature can be a game-changer. Plus, knowing how to customize your device settings empowers you as a user and enhances your overall experience. Let’s delve into the simple steps to make this adjustment and explore the benefits and drawbacks of using a 24-hour clock on your iPhone.

Related: How to Delete Alarm on iPhone 14: A Step-by-Step Guide

Step by Step Tutorial to Switch to a 24-hour Clock on iPhone

Before we dive into the steps, it’s worth noting that changing to a 24-hour clock will provide you with a more precise way to manage your time throughout the day.

Step 1: Open Settings

Open the “Settings” app on your iPhone.

The “Settings” app is typically found on your home screen and has a gear icon. You’ll find most of your phone’s customizable features here.

Step 2: Tap on General

Scroll down and tap on the “General” option.

This section houses many of your iPhone’s broader settings, including language, accessibility, and date & time.

Step 3: Select Date & Time

In the General settings, find and select “Date & Time.”

This is where you can adjust your time zone, set automatic updates, and change your time format.

Step 4: Toggle 24-Hour Time On

Find the “24-Hour Time” option and toggle the switch to the right to turn it on.

When the switch turns green, it indicates that the 24-hour time setting is active.


Enhanced PrecisionWith a 24-hour clock, there’s no room for confusion between AM and PM, which reduces the risk of scheduling mishaps.
Professional StandardMany industries, such as military and healthcare, use the 24-hour clock, so it can be beneficial for professional settings.
Global StandardThe 24-hour clock format is widely used around the world, making it easier for international communication and travel.


Adjustment PeriodSome users may find it takes time to get used to the 24-hour format, especially if they’ve always used the 12-hour clock.
Social InconvenienceIf most of your contacts use the 12-hour format, coordinating times could become more complicated.
Limited AestheticsSome users might prefer the look of the 12-hour clock with AM/PM, finding it more aesthetically pleasing.

Video About the Clock

Additional Information

While switching to a 24-hour clock on your iPhone is straightforward, there are a few things to keep in mind. For starters, not all apps may follow the system settings, so you might encounter the 12-hour format in certain third-party applications. Additionally, if you use Siri or other voice assistants, ensure that you speak times in a 24-hour format to avoid confusion.

Another thing to consider is the use of iOS 17’s 24-hour clock in conjunction with other time-related features. For example, if you use the Bedtime function or set alarms, make sure to input the time accurately, as it will now be in 24-hour format. Also, remember that timing is everything; if you’re setting calendar events or reminders, double-check the times are right to avoid any mix-ups.


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

Frequently Asked Questions

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

No, your alarms will still go off at the set time, but you’ll need to input them using the 24-hour format.

Can I switch back to the 12-hour clock?

Absolutely, you can switch back at any time by following the same steps and turning the “24-Hour Time” toggle off.

Does the 24-hour clock change affect all apps?

Most built-in apps will follow the system settings, but some third-party apps may not.

What happens to my existing calendar events after I switch to a 24-hour clock?

Your events will remain at their set times, but they’ll be displayed in a 24-hour format.

Will Siri understand if I use the 12-hour format by mistake?

Siri is designed to understand context, but it’s always best to use the 24-hour format for clarity.


Mastering the ins and outs of your iPhone, such as switching to a 24-hour clock with iOS 17, can significantly enhance your user experience. Whether for personal preference, professional necessity, or international standardization, this feature adds another layer of customization to your device.

Remember, it’s your iPhone, and you have the power to tailor it to your liking, so why not give the 24-hour clock a shot? Who knows, it might just be the timely change you’ve been looking for.

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