gs_quant.datetime.date.prev_business_date

prev_business_date(dates=datetime.date(2023, 8, 14), calendars=(), week_mask=None)[source]

Returns the previous business date for a given date or date series, defaulting to today.

Parameters:

  • dates (Union[date, Iterable[date]]) – The input date or dates, defaults to today

  • calendars (Union[str, Tuple[str, ...]]) – Calendars to use for holidays

  • week_mask (Optional[str]) – Which days are considered weekends (defaults to Saturday and Sunday)

Return type:

Union[date, Iterable[date]]

Returns:

A date (if dates is a single date) or tuple of dates, adjusted by the offset of one day.

Example

>>> import datetime as dt
>>> prev_bus_date = prev_business_date()