Recently I have found one solution to add calendar in system configuration options. Lets discuss in detail. In order to add calendar in system configuration options, we have to add one system field and require one Block file. Use below code to add system field. <field id=”startdate” translate=”label” type=”text” sortOrder=”20″ showInDefault=”1″ showInWebsite=”1″ showInStore=”1″> <label>Start Date</label>…