Unable to resize the Calendar grid on my MacBook Air

Thank you kindly for your thoughtful reply, and for sharing your experience.

Wondering if events at other times than those displayed may show up if they are added as events first.

By searching the above user guide for MacOS Sequoia, just found this article:

Change the days and times displayed in Calendar on Mac - Apple Support

Eg: says:

"Calendar has several options for customising how many days and hours are shown. You can customise Week view to show all seven days of the week or just Monday to Friday. You can customise Day and Week views so that the Calendar window shows from 6 to 24 hours of events per day, and you can mark when your day starts and ends.

1. Go to the Calendar app  on your Mac.
2. Choose Calendar > Settings, then click General, then choose options from the pop-up menus.

To choose whether times are shown in 12-hour or 24-hour time format, change Language & Region settings."

If the guidance in the above article is not working for you:

You might want to send feedback to Apple ... if others also have this problem, your feedback helps, and the issue may be addressed in a future update.

web-form for Mac feedback: Feedback - Calendar - Apple

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A few thoughts that may or may not help on using iPad with iOS18 :

Change how you view events in Calendar on iPad - Apple Support

Eg: says:

In the Calendar app, you can view one day, week, month, or year at a time, or view a list of upcoming events.

1. Go to the Calendar app  on your iPad.
2. Do any of the following:

• • Zoom in or out: Tap Day, Week, Month, or Year at the top of the screen to zoom in or out on your calendar. In Week or Day view, pinch to zoom in or out.
  • View upcoming events: Tap  to view upcoming events as a list.

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At the bottom of this article below:

Keep track of events in Calendar on iPad - Apple Support

Eg: says:

"If you don’t want to use iCloud for your calendar, you can sync your calendar information between your iPad and your computer. See Sync with your computer."

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Also: Search for events in Calendar on iPad - Apple Support

Eg: says:

"Siri: Say something like: “What’s on my calendar for Friday?”

 Learn how to use Siri."

Mac calendar app issue

Re: " I have an issue with the calendar app. ..." " When I open the app and view the weekly schedule, I can't resize the grid enough to see my entire day. On my MacBook, I can only view a 10-hour window (like 8 AM – 8 PM), which makes it difficult to plan and organize my schedule."

Hello. Am not sure how you use your Calendar, or what settings you may have in place.

Am still using an earlier MacOS version (where viewing a 'day' in iCal shows 12 am to 12 am) on my Mac

I usually have a month viiew, which is limiting, so click "day", when wanting to see a certain day's planning.

Wondering if the online Calendar User Guide for macOS Sequoia may be helpful to you:

Eg: You can click "Table of Contents" at the top of the welcome page that opens from the link below, to see various topics leading to detailed "how to" articles ... there is a whole section on customizing calendar to suit you.

Calendar User Guide for Mac - Apple Support

Thank you kindly for taking the time to thoughtfully let us know! Cheers :-)