A Post-Dated Cheque is a cheque written for a date in future.
In general, a Post-Dated Cheque is not payable until the date on the cheque. Payee can only present cheque to the bank until the date.
How long can a Post-Dated Cheque be? In some countries, there is a limit on the date, for example cheque date can only be set within 180 days. You may consult your bank and check the maximum date range for a Post-Dated Cheque.