Dynamically Refresh SQL Server Reporting Services Report Date Parameters

You created a report in SQL Server Reporting Services that has four parameters Year, Month and two Calendar Date Picker parameters StartDate and EndDate. The default values for StartDate and EndDate are determined by theYear and Month parameters. So when a new Month or Year is selected the value for StartDate should be the first day of the Month and the EndDate should be the last day of the Month. When you set default values for StartDateand EndDate the parameter values are correct the first time, but if you change the Month or Year the values forStartDate and EndDate don't change. In this tip we show how to solve this problem.

Check out complete article here.https://www.mssqltips.com/sqlservertip/3560/dynamically-refresh-sql-server-reporting-services-report-date-parameters/