Siebel Applications Administration Guide > Ongoing Application Administration Tasks >
About Date Formats
For the Siebel Web Client, the display format for date and time is determined by the locale settings of the application server. For more information, see Setting Up Locales.
For the Siebel Developer Web Client and the Siebel Mobile Web Client, the date format is determined by the specification in the client computer's operating system.
When a user creates a query using a date field, the user must use the appropriate date format.