Cant Select Date Before 1970

[mostafaashr]

The Service Portal Date picker throws a false validation error for birthdates before 1970 due to a bug in parsing negative epoch time with the dd/MM/yyyy format. While browser/native engines blindly auto-correct modern dates after 1970, they completely fail to guess or parse older dates, triggering a false "Invalid Date Format" error.

[DrewW]

I think you may need to check to see if you have any validation scripts or client scripts added for your instance because we have a date var on every cat item we have and it will happily take 19/07/1919.

[Tanushree Maiti]

Hi @mostafaashr 

Refer this KB: KB0782953 Valid_to date is set improperly when the date format for the system is changed to - dd-MMM... 

Workaround

Do not use date formats that include only two digits for the year (eg. dd-MM-yy, dd-MMM-yy). Use a date format that uses 4 digits for the year (eg.YYYY-MM-dd,  MM-dd-YYYY).

Please note this is not a platform issue, two-digit year format shouldn't be used for representing a year. Please see the docs for more details:

https://docs.servicenow.com/csh?topicname=t_PersonalizeTheSystemDateFormat.html&version=latest

[mostafaashr]

Thanks for the response, but this KB is irrelevant to my issue. I am not using a two-digit year format. My system date format is already configured using 4 digits (dd/MM/yyyy).

The issue specifically happens with the Service Portal date picker failing to parse dates before the year 1970 (negative epoch time) on this 4-digit format. Modern dates after 1970 work completely fine