You set a weekday alarm once, then you forget about it. The problem shows up on a holiday morning, when your phone still plans to wake you up like it is a normal workday.
iOS includes a small feature that helps prevent this. The iPhone can surface a suggestion tied to a holiday calendar entry and offer an “Edit Alarm” prompt for the next day. Without that reminder, many people would forget to change the alarm in time.
What you are seeing
This prompt shows up as a Siri Suggestion, even if you do not think of it as “Siri.” Apple uses the Siri label for many on-device suggestions that come from your habits, calendar events, and app context.
In practice, the phone connects a known holiday in your calendar with an alarm that normally rings on that day. Then it nudges you before you go to sleep, or when you search, so you can adjust the alarm in time. People have reported similar prompts in past iOS versions, including iOS 18.
Most iPhones keep Siri Suggestions enabled by default, but app-level toggles can block them. You can check them in under a minute.
- Open Settings.
- Tap Apple Intelligence & Siri (or Siri).
- Tap Apps.
- Tap Clock and make sure suggestions are allowed.
Why you might not get the prompt every time
You will not always see the suggestion, even if you run the latest iOS. Calendar setup matters, and timing matters. If your holiday calendar does not include the event, the phone has nothing to match. If you use a Sleep Schedule alarm instead of a standard Clock alarm, you may see different controls and prompts.
If you want a more predictable option, you can handle holidays with Shortcuts automations that toggle alarms based on your calendar. That takes a few minutes to set up, but it runs the same way every time.
If you rely on weekday alarms, check your Siri Suggestions settings for the Clock app. Then make sure your holiday calendar stays enabled. The next time a public holiday lands midweek, iOS can save you from a rude wake-up.
