https://docs.dask.org/en/stable/generated/dask.dataframe.Series.dt.daysinmonth.html
dask.dataframe.Series.dt.daysinmonth — Dask documentation
daskdataframeseriesdtdocumentation
https://www.ibm.com/docs/en/db2/12.1.x?topic=methods-daysinmonthint32-year-int32-month
DB2DateTime.DaysInMonth(Int32 year, Int32 month) method
Returns the number of days that are in the specified month of the year.
yearmonthmethod