I am getting familiar with Windows 11 and discovered this gem. I am assuming it is new with Windows 11, but maybe it has been there for awhile and I have been missing out!
Here is the Windows calculator (I seem to use it multiple times each day).
Clicking the upper left menu shows the list of various types of calculators. I discovered the DATE RANGE calculator function, and I am thrilled!
Select DATE CALCULATION. Pick a starting date and an end date from calendar pickers. The bottom row instantly displays the number of days in the range selected. No more counting days in the Outlook calendar!!
Troy @ TLC