Hi,

You can use onChange client script on the required field and write the code to check if the user is entering the past date.

Please mark correct/helpful based on impact.

Regards,

Bharath kumar

Hi Gayathri,

Create onChange Client Script on Field u want to change.

function onChange(control, oldValue, newValue, isLoading) {
    if (isLoading || newValue == '') {
        return;
    }

    var currentDate = new Date(); //Current Date
    var selectedDate = new Date(g_form.getValue('u_date_field')); //Date field value

    if (currentDate.getTime() >= selectedDate.getTime()) {
        //Past Date on Date field should thrown an error near field
        g_form.showFieldMsg('You can not select a Past Date');
        return false;
    }

}

Hi Gayathri

If my above response is helpful, then Please mark as Correct Answer/Helpful.

If you have any queries, let us know.

Thanks 🙂

Hi, 

Try Below...It works.

Client Script : Onchange Client Script

function onChange(control, oldValue, newValue, isLoading, isTemplate) {
    if (isLoading || newValue === '') {
        return;
    }
    var udt = newValue;
    var ga = new GlideAjax("GetCurrentDateAndTime");
    ga.addParam('sysparm_name', 'GetDate');
    ga.addParam('sysparm_get_date', udt);
    ga.getXML(HelloWorldParse);

    function HelloWorldParse(response) {
        var answer = response.responseXML.documentElement.getAttribute("answer");
        if (answer == '5') {
            g_form.setValue('date_field_name', "");
            return false;
    }
}
}

Script Include

var GetCurrentDateAndTime = Class.create();
GetCurrentDateAndTime.prototype = Object.extendsObject(AbstractAjaxProcessor, {
    GetDate: function() {
        var getNum = this.getParameter('sysparm_get_date');
        var nd = new GlideDateTime();
        if (getNum > nd) {
            return 5;
    },
    type: 'GetCurrentDateAndTime'
});