| busdaycalendar([weekmask, holidays]) | A business day calendar object that efficiently stores information defining valid days for the busday family of functions. | 
 
| is_busday(dates[, weekmask, holidays, …]) | Calculates which of the given dates are valid days, and which are not. | 
 
| busday_offset(dates, offsets[, roll, …]) | First adjusts the date to fall on a valid day according to the rollrule, then applies offsets to the given dates counted in valid days. | 
 
| busday_count(begindates, enddates[, …]) | Counts the number of valid days between begindatesandenddates, not including the day ofenddates. |