msg 102 incorrect syntax - sql-server-2008

Question

Below is the drop and create script for my stored procedure.While executing this script on Database i'm getting error
Msg 102, Level 15, State 1, Line 18
Incorrect syntax near 'Date'.
Msg 105, Level 15, State 1, Line 35
Unclosed quotation mark after the character string '
END
'.
i tried with adding-removing quotation marks but did not worked.
can anyone tell what i have to do in order to execute the script successfully
/****** Object: StoredProcedure [dbo].[MY_PROC] Script Date: 9/12/2013 3:31:17 PM ******/
IF EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[MY_PROC]') AND type in (N'P', N'PC'))
DROP PROCEDURE [dbo].[MY_PROC]
GO
/****** Object: StoredProcedure [dbo].[MY_PROC] Script Date: 9/12/2013 3:31:17 PM ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[MY_PROC]') AND type in (N'P', N'PC'))
BEGIN
EXEC dbo.sp_executesql #statement = N'CREATE PROCEDURE [dbo].[MY_PROC]
(#P_Date DateTime=null)
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
DECLARE #M_DATE_PARAM DATETIME
DECLARE #M_PREVIOUS_DATE DATETIME
DECLARE #M_TODAYS_DATE DATETIME
IF #P_Date IS NULL
SET #P_Date=GetDate()
PRINT 'Date passed as a parameter -' + CAST(#P_Date AS varchar(100))
BEGIN TRY
BEGIN TRANSACTION REIMBURSEMENT_TRN
BEGIN
-- my statements go here which do not cause any error
END
PRINT 'SUCCESS: Procedure Success'
COMMIT TRANSACTION ;
END TRY
BEGIN CATCH
PRINT 'ERROR: Procedure Fail'
PRINT ERROR_MESSAGE()
PRINT ERROR_LINE()
ROLLBACK TRANSACTION ;
END CATCH
PRINT 'Procedure Complete'
END

Answer 1

You should escape single quotation with another quotation
try this one :
PRINT ''Date passed as a parameter -'' + CAST(#P_Date AS varchar(100))
EDIT
By the way you should put an END at the end of your query
Complete code :
/****** Object: StoredProcedure [dbo].[MY_PROC] Script Date: 9/12/2013 3:31:17 PM ******/
IF EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[MY_PROC]') AND type in (N'P', N'PC'))
DROP PROCEDURE [dbo].[MY_PROC]
GO
/****** Object: StoredProcedure [dbo].[MY_PROC] Script Date: 9/12/2013 3:31:17 PM ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[MY_PROC]') AND type in (N'P', N'PC'))
BEGIN
EXEC dbo.sp_executesql N'CREATE PROCEDURE [dbo].[MY_PROC]
(#P_Date DateTime=null)
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
DECLARE #M_DATE_PARAM DATETIME
DECLARE #M_PREVIOUS_DATE DATETIME
DECLARE #M_TODAYS_DATE DATETIME
IF #P_Date IS NULL
SET #P_Date=GetDate()
PRINT ''Date passed as a parameter -'' + CAST(#P_Date AS varchar(100))
BEGIN TRY
BEGIN TRANSACTION REIMBURSEMENT_TRN
BEGIN
-- my statements go here which do not cause any error
END
PRINT ''SUCCESS: Procedure Success''
COMMIT TRANSACTION ;
END TRY
BEGIN CATCH
PRINT ''ERROR: Procedure Fail''
PRINT ERROR_MESSAGE()
PRINT ERROR_LINE()
ROLLBACK TRANSACTION ;
END CATCH
PRINT ''Procedure Complete''
END'
END

Answer 2

PRINT needs a character string or Unicode string constant
Try to use
PRINT N''Date passed as a parameter -''...
Also you've missed the final quote after END of procedure.
EXEC dbo.sp_executesql #statement = N'CREATE PROCEDURE [dbo].[MY_PROC]
(#P_Date DateTime=null)
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
DECLARE #M_DATE_PARAM DATETIME
DECLARE #M_PREVIOUS_DATE DATETIME
DECLARE #M_TODAYS_DATE DATETIME
IF #P_Date IS NULL
SET #P_Date=GetDate()
PRINT N''Date passed as a parameter -'' + CAST(#P_Date AS varchar(100))
BEGIN TRY
BEGIN TRANSACTION REIMBURSEMENT_TRN
BEGIN
-- my statements go here which do not cause any error
END
PRINT N''SUCCESS: Procedure Success''
COMMIT TRANSACTION ;
END TRY
BEGIN CATCH
PRINT N''ERROR: Procedure Fail''
PRINT ERROR_MESSAGE()
PRINT ERROR_LINE()
ROLLBACK TRANSACTION ;
END CATCH
PRINT N''Procedure Complete''
END'