BEGIN TRAN 

declare @startdate date = '2005-01-01',
    @enddate date = '2014-12-31'

IF @startdate IS NULL
    BEGIN
        Select Top 1 @startdate = FulldateAlternateKey
        From DimDate 
        Order By DateKey ASC 
    END

Declare @datelist table (FullDate date)

while @startdate <= @enddate

Begin 
    Insert into @datelist (FullDate)
    Select @startdate

    Set @startdate = dateadd(dd,1,@startdate)

end 

 Insert into dbo.DimDate 
    (DateKey, 
        FullDateAlternateKey, 
        DayNumberOfWeek, 
        EnglishDayNameOfWeek, 
        SpanishDayNameOfWeek, 
        FrenchDayNameOfWeek, 
        DayNumberOfMonth, 
        DayNumberOfYear, 
        WeekNumberOfYear, 
        EnglishMonthName, 
        SpanishMonthName, 
        FrenchMonthName, 
        MonthNumberOfYear, 
        CalendarQuarter, 
        CalendarYear, 
        CalendarSemester, 
        FiscalQuarter, 
        FiscalYear, 
        FiscalSemester)


select convert(int,convert(varchar,dl.FullDate,112)) as DateKey,
    dl.FullDate,
    datepart(dw,dl.FullDate) as DayNumberOfWeek,
    datename(weekday,dl.FullDate) as EnglishDayNameOfWeek,
    (Select top 1 SpanishDayNameOfWeek From DimDate Where EnglishDayNameOfWeek = datename(weekday,dl.FullDate)) as SpanishDayNameOfWeek,
    (Select top 1 FrenchDayNameOfWeek From DimDate Where EnglishDayNameOfWeek = datename(weekday,dl.FullDate)) as FrenchDayNameOfWeek,
    datepart(d,dl.FullDate) as DayNumberOfMonth,
    datepart(dy,dl.FullDate) as DayNumberOfYear,
    datepart(wk, dl.FUllDate) as WeekNumberOfYear,
    datename(MONTH,dl.FullDate) as EnglishMonthName,
    (Select top 1 SpanishMonthName From DimDate Where EnglishMonthName = datename(MONTH,dl.FullDate)) as SpanishMonthName,
    (Select top 1 FrenchMonthName From DimDate Where EnglishMonthName = datename(MONTH,dl.FullDate)) as FrenchMonthName,
    Month(dl.FullDate) as MonthNumberOfYear,
    datepart(qq, dl.FullDate) as CalendarQuarter,
    year(dl.FullDate) as CalendarYear,
    case datepart(qq, dl.FullDate)
        when 1 then 1
        when 2 then 1
        when 3 then 2
        when 4 then 2
    end as CalendarSemester,
    case datepart(qq, dl.FullDate)
        when 1 then 3
        when 2 then 4
        when 3 then 1
        when 4 then 2
    end as FiscalQuarter,
    case datepart(qq, dl.FullDate)
        when 1 then year(dl.FullDate)
        when 2 then year(dl.FullDate)
        when 3 then year(dl.FullDate) + 1
        when 4 then year(dl.FullDate) + 1
    end as FiscalYear,
    case datepart(qq, dl.FullDate)
        when 1 then 2
        when 2 then 2
        when 3 then 1
        when 4 then 1
    end as FiscalSemester

from @datelist dl left join 
    DimDate dd 
        on dl.FullDate = dd.FullDateAlternateKey
Where dd.FullDateAlternateKey is null 




COMMIT TRAN

I’ve tested the script against AdventureWorksDW2012 and AdventureWorksDW2008R2 and it worked great.

Let me know if you found this useful! Thanks for reading!