formatting week number in data table

I have a date table and am trying to get the week number to output two digits every time. I currently have the formula below, but the output will just have one digit if the week number is a single digit i.e. it will show 1 instead of 01.  This gets the sorting out of order. I want the output to get two digits everytime. 

Date =
ADDCOLUMNS (
CALENDAR (date(2017, 1,1), date(2018,12,31)),

"Year", YEAR ( [date] ),
"QuarterOfYear", FORMAT ( [Date], "Q" ),
"MonthOfYear", FORMAT ( [Date], "MM" ),
"DateInt", FORMAT ( [Date], "YYYYMMDD" ),
"MonthName", FORMAT ( [Date], "mmmm" ),
"MonthYear", FORMAT ( [Date], "mmm YY"),
"QuarterInCalendar", "Q" & FORMAT ( [Date], "Q" ) & " " & FORMAT ( [Date], "YYYY" ),
"WeekNum", FORMAT( [date], "ww/YYYY" ),
"YearWeekNum", Format ( [date], "YYYY/ww"),
"DayInWeek", WEEKDAY ( [Date] ),
"DayOfWeekName", FORMAT ( [Date], "dddd" ),
"DayOfWeekShort", FORMAT ( [Date], "ddd" ),
"YearMonthShort", FORMAT ( [Date], "YYYY mm" ),
"MonthNameShort", FORMAT ( [Date], "mmm" ))