Ok it's like this. I have store procedure in my background that i use it and i call that store procedure in my data set. Also i have one web page from where i click on a button and url is passed to the reporting services and than report is exported in Excel file. URL is

http://localhost/BOPortal/Reports/View/Events?FromDate=2016-06-22%2022:00:00&ToDate=2016-06-23%2021:59:00&Language=en-GB&User=admin

The same names from the url are in the report , FromDate and ToDate. When i test that report i create 2 test text boxes and put FromDate and ToDAte parameters to see what i get back when parameters are passed from web page to my reporting services.

So it's very strange that FromDate parameter is correct and ToDate is not.I don't use any expression in report, just use parameters from web page and from store procedure)they are the same).

But when i just play with parameters in Reporting services and chose From and ToDate the result is ok.Only problem is when i get those parameters from web page