1. Start > Run > Regedit > OK
2. Browse to HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
3. Create New DWORD Value
4. Name it “MaxRecentDocs“
5. Double-click on the new DWORD
6. Set value data to “19” ( equals 25 )
7. Leave Base as “Hexadecimal“
8. OK
9. Restart your computer

My Setup:

• SQL Server v2008 / v2008 R2
• Report Builder 2.0+ or Business Intelligence Development Studio (BIDS) v2008
• DB User who can create functions on a database.

Introduction
This has to be the 3rd article on creating a calendar in SQL Server Reporting Services on this website. These should be:

• Room Availability Calendar
• SQL Calendar using Business Intelligence Development Studio (BIDS)

Another one?
The above 2 articles relate to examples that I did using what I could from the Internet (and we all know how no one ever seems to have the same tools/environment setup as you) so they were a bit ad hoc and more of a personal opinion than anything official.

The following example comes from an actual book that my day job purchased for us. It includes a better example of an Outlook-like monthly calendar with interactivity. You could just download it from the web but I have the additional task of connecting it to an events database.

Main Calendar Generator Function

CREATE FUNCTION fn_GenerateMonth(@MonthNum int, @Year int)
RETURNS
@Month TABLE
(
	-- Add the clumn definitions for the TABLE variable here
	MonthDate datetime,
	DayNumber int,
	DayName varchar(12),
	DayOfWeek int,
	WeekOfMonth int,
	MonthName varchar(12)
)
AS
BEGIN
	DECLARE @MonthDate datetime
	DECLARE @WeekOfMonth int
	DECLARE @WeekFillDate datetime
	DECLARE @MonthName varchar(12)

	SET @WeekOfMonth = 1

	-- Find the first day of the month and the month name
	SET @MonthDate = RIGHT('0' + CONVERT(varchar(2), @MonthNum),2) + '/01/' + CONVERT(char(4), @Year)
	SET @MonthName = DATENAME(mm, @MonthDate)

	-- Back up to the first day of the week containing the first day of the month.
	SET @WeekFillDate = @MonthDate
	WHILE DATEPART(dw, @WeekFillDate) > 1
	BEGIN
		SET @WeekFillDate = DATEADD(dd, -1, @WeekFillDate)

		INSERT INTO
		@Month (MonthDate, DayNumber, DayName, DayOfWeek, WeekOfMonth, MonthName)
		VALUES (@WeekFillDate, DAY(@WeekFillDate), DATENAME(dw, @WeekFillDate), DATEPART(dw, @WeekFillDate), @WeekOfMonth, @MonthName)
	END

	WHILE MONTH(@MonthDate) = @MonthNum
	BEGIN
		IF DATEPART(dw, @MonthDate) = 1 AND DAY(@MonthDate) > 1
		BEGIN
			SET @WeekOfMonth = @WeekOfMonth + 1
		END

		INSERT INTO
		@Month (MonthDate, DayNumber, DayName, DayOfWeek, WeekOfMonth, MonthName)
		VALUES (@MonthDate, DAY(@MonthDate), DATENAME(dw, @MonthDate), DATEPART(dw, @MonthDate), @WeekOfMonth, @MonthName)

		SET @MonthDate = DATEADD(dd, 1, @MonthDate)
	END

	-- Finish up the week containing the last day fo the month.
	SET @WeekFillDate = DATEADD(dd, -1, @MonthDate)
	WHILE DATEPART(dw, @WeekFillDate) < 7
	BEGIN
		SET @WeekFillDate = DATEADD(dd, -1 , @MonthDate)

		INSERT INTO
		@Month (MonthDate, DayNumber, DayName, DayOfWeek, WeekOfMonth, MonthName)
		VALUES (@WeekFillDate, DAY(@WeekFillDate), DATENAME(dw, @WeekFillDate), DATEPART(dw, @WeekFillDate), @WeekOfMonth, @MonthName)
	END
	RETURN
END

	-- We can see the output from the function by running a simple test query in SQL
	-- Server Management Studio, executing this command, passing 12 for the month and 2009 for the year.
	-- Example: SELECT * FROM dbo.fn_GenerateMonth(12, 2009)

Do not use this article: In the middle of doing