extjs-gpl/modern/theme-windows/overrides/picker/Date.js

GPL licensed version of Sencha Ext JS

Ext.define('Ext.theme.windows.picker.Date', {
    override: 'Ext.picker.Date',

    config: {
        doneButton: {
            iconCls: 'check2',
            ui: 'round',
            text: ''
        }
    }
});