=

VAR Start_Date =

MIN ( data[Start] )

VAR End_Date =

MAX ( data[End] )

VAR Column_Date =

MAX ( 'Calendar'[Date] )

RETURN

IF ( Start_Date <= Column_Date && End_Date >= Column_Date, 1, BLANK )

i get error:

The expression is not valid or appears to be incomplete. Please review and correct the expression.
The syntax for ')' is incorrect. (DAX(

VAR Start_Date = MIN ( data[Start] )

VAR End_Date = MAX ( data[End] )

VAR Column_Date = MAX ( 'Calendar'[Date] )

RETURN

IF ( Start_Date <= Column_Date && End_Date >= Column_Date, 1, BLANK )
)).