Date Function (DAX)

When creation a calender table with DAX I run into an error that can only be solved with using double delimiters:

Below you see that on the second line I entered ",," as a dilimeter.  If i don't I'll get this error message:

"Too few arguments were passed to the DATE function. The minimum argument count for the function is 3."

Calendar = ADDCOLUMNS (
CALENDAR (DATE(2018,,1,,1), DATE(2025,,12,,31)),
"DateAsInteger", FORMAT ( [Date], "YYYYMMDD" ),
"Year", YEAR ( [Date] ),
"Monthnumber", FORMAT ( [Date], "MM" ),
"YearMonthnumber", FORMAT ( [Date], "YYYY/MM" ),
"YearMonthShort", FORMAT ( [Date], "YYYY/mmm" ),
"MonthNameShort", FORMAT ( [Date], "mmm" ),
"MonthNameLong", FORMAT ( [Date], "mmmm" ),
"DayOfWeekNumber", WEEKDAY ( [Date] ),
"DayOfWeek", FORMAT ( [Date], "dddd" ),
"DayOfWeekShort", FORMAT ( [Date], "ddd" ),
"Quarter", "Q" & FORMAT ( [Date], "Q" ),
"YearQuarter", FORMAT ( [Date], "YYYY" ) & "/Q" & FORMAT ( [Date], "Q" )
)

Does anyone have an idea?