1. The document describes how to create a Java business service (JBS) in Siebel to convert Gregorian dates to Hijri dates. 2. It involves configuring Java in the Siebel configuration file, adding required JAR files, writing Java code to implement the date conversion logic, exporting the code as a JAR file, and creating the JBS in Siebel with matching methods and properties. 3. The key steps are: configuring Java in the CFG file, adding the Siebel JAR, writing code to convert dates on the "GregToHijry" method, exporting the code as a JAR, and creating the JBS with a matching method and input/output properties