@Override
    public boolean isExpired(final TicketGrantingTicketAwareTicket ticketState) {
        val expiringTime = toMaximumExpirationTime(ticketState);
        val now = ZonedDateTime.now(getClock());
        return expiringTime.isBefore(now);
    }
Ticket expiration policy based on a predefined fixed expiration date.

@author Misagh
@since 7.0.0
core/cas-server-core-tickets-api/src/main/java/org/apereo/cas/ticket/expiration/FixedInstantExpirationPolicy.java