Step - date_trunc
date_trunc · dateTrunc · category: Dates and times
Truncates to a DT unit (PostgreSQL date_trunc).
Forms
date_trunc(arg1: DT)
date_trunc(arg1: DT, arg2: string)
Example
g.inject(date("2023-08-17")).date_trunc(DT.month).next().day // 1