The Quick View Calendar Mac OS X app provides a calendar of the current month from the menu bar.
Quick View Calendar adapts to the light and dark menu bar modes:
Today’s date is highlighted with the current system preference highlight color so no extra settings are required.
To make sure Quick View Calendar runs every time you log in or restart your Mac, add it as a Login Item, as described in this Apple Support article.
If you have any problems using Quick View Calendar, please email me.