Easy Date Converter Calendar Display German Version
Clicking on Display month brings up a window as follows:
You can then copy the output to the clipboard, change the calendar (Common Era or Julian), set the first day of the week (Sunday or Monday), move forward or back, or select a different month to display.
If the Common Era Calendar and Monday are selected then one can obtain a display for the month shown which gives the corresponding ISO 8601 Week dates, for example:
Easy Date Converter Main Page Date/Calendar Software Hermetic Systems Home Page