Returns the day-of-the-week in a month of a date as a number (e.g. 3 for the 3rd Tuesday in May). If no argument is given, then the current local date/time, as returned by date:date-time is used as the default argument.
day-of-week-in-month($date-time as string?) ➔ number
The input date/time
Links to specifications
Requires Saxon-PE or Saxon-EE. Available for Java and C/C++ only (not .NET).