Outlook Calendar Shows 24 Hours

Outlook Calendar Shows 24 Hours. For example, in calendar in the month view, if you are using the default settings for. The view of outlook calendar has just switched to a different view, all of a sudden, without explanation and without a discernible cause:

Hi, i’ve always had calendar set to display working hours only but today the view has changes to 24 hours with a lot of redundant spaces. How can i revert to the previous.