UA863 SFO-SYD 77W on 12/30 has United posting a verbose explanation for a 30 minute departure delay but arriving 30 minute ahead of scheduled arrival. The odd thing is United says it is due to the flight operating outside of the airports normal operating hours. But with a 9am-ish arrival time, the 6am Sydney curfew would not be a factor 🤷🏻‍♂️