fiscal_month_first_day({date})

Accepts a DateTime, DateOnly, or legacy Date object as input. Returns an object of the same type that corresponds to the first day of the fiscal month that contains the specified date.

Example 

1SELECT OrderDate as "date", fiscal_month_first_day(OrderDate) as "fiscal_month_first_day" FROM "dates_sample_data";
datefiscal_month_first_day
2015-01-21 15:30:002015-01-01 00:00:00
2015-01-21 00:00:002015-01-01 00:00:00
2015-01-31 10:00:302015-01-01 00:00:00
2015-02-03 15:30:002015-02-01 00:00:00
2016-01-21 23:59:592016-01-01 00:00:00
2015-10-31 23:59:592015-10-01 00:00:00
2015-12-03 00:00:002015-12-01 00:00:00
2016-01-11 03:30:002016-01-01 00:00:00
2016-01-11 03:30:002016-01-01 00:00:00