Functional folks could write that in Elixir as {:ok, end_of_november} = 3 ¦> weeks ¦> ago ¦> next_month ¦> beginning_of_month ¦> last_weekday ¦> end_of_day g

Functional folks could write that in Elixir as {:ok, end_of_november} = 3 ¦> weeks ¦> ago ¦> next_month ¦> beginning_of_month ¦> last_weekday ¦> end_of_day given the appropriate function declarations accepting at least either a number or a DateTime or some intermediate data structure as argument.