After the April 2025 security updates are installed Outlook 2016 will crash when you bring up your Calendar in Outlook.

It appears to be related to option to display the Weather in your Calendar.

To correct this open Outlook go to File, Options, Calendar and at the bottom uncheck Show weather on the calendar.

 

 

 

 

Now you should be able to get your Calendar to display without Outlook crashing.

Fix released by Microsoft for this issue 4/10/2025 – KB5002623