Hello @Sirri
To achieve this, please use below onChange Catalog Client Script:
function onChange(control, oldValue, newValue, isLoading) {
//Stop processing further code from running when the form initially loads with pre-existing values
if (isLoading) {
return;
}
// Stop processing further code from running when user clears the field, as there is nothing to validate
if (!newValue || newValue == '') {
return;
}
var pastMsg = "The time chosen to send out the communication occurs in the past, kindly select a future date/time to proceed.";
var leadMsg = "Please allow two working days lead time for approvals and content review.";
// Required to separate the date component from the time component for independent parsing -- ServiceNow date/time variable stores value as "2026-05-20 12:48:24"
var parts = newValue.split(' ');
// Required to extract year, month, and day as separate values from the date string like "2026-05-20"
var d = parts[0].split('-');
// Required to extract hour, minute, and second as separate values from the time string like "12:48:24"
var t = parts[1].split(':');
// Required to construct a valid JavaScript Date; month is decremented by 1 because JavaScript months are 0-indexed (0=Jan, 11=Dec)
var selected = new Date(parseInt(d[0], 10), parseInt(d[1], 10) - 1, parseInt(d[2], 10), parseInt(t[0], 10), parseInt(t[1], 10), parseInt(t[2], 10));
// Capture the current date/time as the baseline for both past-date and lead-time validations
var now = new Date();
// Communications cannot be scheduled in the past
if (selected.getTime() < now.getTime()) {
alert(pastMsg);
g_form.setValue('time_to_send_out_comms', ''); //Clear the variable value
return; // Stop processing further code
}
// Calculate the earliest allowed date/time by starting from the current moment and adding 2 working days while preserving the exact time (hour-based comparison)
var minDate = new Date(now.getTime());
// Track how many valid working days have been counted toward the 2-day minimum
var workingDaysAdded = 0;
// iterate day-by-day until exactly 2 working days (Sunday–Thursday) have been accumulated
while (workingDaysAdded < 2) {
// Advance the date by one calendar day for each iteration
minDate.setDate(minDate.getDate() + 1);
// Determine if the current day in the loop is a working day or a non-working day
var dayOfWeek = minDate.getDay();
// Skip Friday (5) and Saturday (6) as they are defined as non-working days per business requirements
if (dayOfWeek !== 5 && dayOfWeek !== 6) {
// Count only valid working days toward the 2-day lead time requirement
workingDaysAdded++;
}
}
// Selected date/time must be at or after the same hour/minute/second on the 2nd working day from now
if (selected.getTime() < minDate.getTime()) {
alert(leadMsg);
g_form.setValue('time_to_send_out_comms', ''); //Clear the variable value
return; // Stop processing further code
}
}
Validation Results:
When Selected Yesterday:
When Selected current or future Date which is less than 2 working days:
When future date allowing 2 working days is selected:
