Formula that identifies if a data is the first business day of the month

[tsallis23]

Hey guys, anyone nows a formula that given a specific date field it returns if that date is the first business day of the month? It could return True or False.
thanks a lot for any tips on how to get there.

[FlowDigital]

I believe this should do the trick:

DAY({Date}) = 
IF(
  WEEKDAY(DATETIME_PARSE(DATETIME_FORMAT({Date}, 'YYYY-MM') & '-01')) = 0, 2,
  IF(
    WEEKDAY(DATETIME_PARSE(DATETIME_FORMAT({Date}, 'YYYY-MM') & '-01')) = 6, 3,
    1
  )
)