globalization Element in web.config

I would like to provide a textbox to user and let them filter data by a given date in (dd/MM/yyyy) format.

query = query.Where(i => i.OperationDate <= end);

Unfortunately, query results seems not working properly. It seems that SQL Server uses date format (MM/dd/yyyy) to do the searching. Then, the question is how to specify the date format in my web application. By adding following line in web.config, the issue is solved.

CultureInfo Class:
Represents information about a specific culture including the names of the culture,the writing system, and the calendar used, as well as access to culture-specific objects that provide information for common operations, such as formatting dates and sorting strings.