>Hello at alls.
>I wonder to know with one the way to get the first month day since any date and in format DD/MM/YYYY.
>TIA

DATE() - DAY(GoMonth(DATE(),1)-1)

Should find you the first day of any date you enter. So replace DATE() with a variable storing the date you are interested in and it should find the first day of the month. If you want to know the Character day of the week surrond the above with the function CDOW()

HTH