How to restrict past date selection in due date field in problem task

[Gopal14]

Hi Team,

I want to restrict past date selection in due date field in problem task and Change task tables.

I have tried directly in UI Policy, it is working but in form it is showing error, if selected date has passed past date.

Apart from that how can i do this

[Ankur Bawiskar]

@Gopal14 

why you don't want to clear?

I recommend clear since validation fails.

This ensures user doesn't save with wrong data.

💡 If my response helped, please mark it as correct ✅ and close the thread 🔒— this helps future readers find the solution faster! 🙏

[Deepak Shaerma]

Hi @Gopal14 

Try this onchange client script:

Type: onChange
Table: Problem Task [problem_task]
Field Name: Due date [due_date]

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

    // 1. Get the current date (Browser time) and zero out the time component
    var today = new Date();
    today.setHours(0, 0, 0, 0);

    // 2. Convert the ServiceNow date format to a JS Date object
    // g_user_date_format is a system variable that ensures it works with your user's format preference
    var inputDateNum = getDateFromFormat(newValue, g_user_date_format);
    var inputDate = new Date(inputDateNum);
    inputDate.setHours(0, 0, 0, 0);

    // 3. Compare: If Input is strictly less than Today, it is in the past.
    // (If it is Equal to Today, this condition is false, so it allows it.)
    if (inputDate < today) {
        g_form.addErrorMessage('Due date cannot be in the past. Please select Today or a future date.');
        g_form.clearValue('due_date'); // Optional: Clear the invalid entry
    }
}

If you don't want to maintain a script, you can use a UI Policy.

Table: Problem Task [problem_task]
Short Description: Validate Due Date not in Past

Conditions:

• Due date | before | Today
  Run scripts: Checked.
  Execute if true:

function onCondition() {
    g_form.addErrorMessage('Past dates are not allowed.');
    g_form.clearValue('due_date');
}

Happy to help! ‌‌
To help others in the community find this solution, kindly mark this response as the Correct Answer ‌‌ and Helpful‌‌.
Warm Regards,
Deepak Sharma
Community Rising Star 2025