week number on the right side
Put the week number in Month view on the left side before the date number or at the right side.
Add week offset number option under: Outlook > Preferences > Calendar > Calendar Options > Show week
there's a similar thread:
”The location of the week number is not following conventions at the moment "insider".
The day number is located in the upper left corner each day.
The week number is located in the upper right corner, the first day of the week.
There's two problems with this. Since the week hierarchically is above day, the week number should be above (outside) day. This means week should be located to the left, the first day of the week. Day number should align to the right, for each day.
This makes it way more natural to read, and more logically, at least for all european users that are used to week numbers.”