Wait times are not horrible for when CX 812 arrives. We have Global Entry thank goodness. I have seen some real messes in there at other times. Twice within the past year we have been held on board the aircraft, not allowed to de-plane as there were too many people in the hall. You can check historical data here: https://awt.cbp.gov/

This is a sampling from June 4-11 around the CX 812 arrival time.

The 0145A departure time is the ideal departure time if you ask me. For Boston sourced pax, it essentially allows the pax to have a full day at work, and then head to the airport after dinner instead of waiting until the next day. Super efficient for vacations. For HKG sourced travelers, it allows a full day in BOS before heading back to HKG.

I'd imagine most of the pax on the North America end are sourced from the BOS area. Surely, they're not getting pax flying LAX-BOS-HKG-SYD, though I might be crazy enough to actually do such an itinerary :D (Sister who lives in BOS, girlfriend lives in HKG).

What is the service timing aboard; specifically in F? Meals first or just on demand?

Thanks
FDW

From Boston...Drinks, Caviar Service, Dinner etc after take-off, but I'm sure you could switch the timing if you wanted.

Did you make it?
I'm thinking of getting to terminal E at around 1am, wondering if security would be closed.

Will travel from YVR-HKG on CX889 (I am on F, whilst my parents are in J), how do I plan the pattern for myself and my parents to adjust the personal clock? (dep YVR on 7/4 02:30AM, and arr HKG at 8/4 7:20am HK Time)

Easy - take a nap in the evening, arrive at the airport past midnight, board and have a leisurely supper, watch an episode or two, then fall asleep with 10 hours to go. Wake up 90 mins before landing (~6am HKT) in time for breakfast, freshen up and change, then land in HKG. Some people prefer sleeping immediately, waking up for a midnight snack (or meal), then going back to sleep. I can't fall asleep again that easily, but it might work for others.

Unless you can be knocked out for 9-10 hours straight, try not to sleep too soon after takeoff or you'll risk waking up at ~2-3am HKT. Then again, westbound TPAC jetlag has always been an easy fix for me, so YMMV. The reverse, however, is much harder to deal with IMHO.

Arriving in the morning is always good, isn’t it? It makes good use of time.
Departing at midnight just makes everything better.

Anyway, answering my own question: there was a Jetblue flight departing about midnight, and I presume the security checkin would be open til 1am though I wasn't there to see.
There is no TSA precheck there, if you were wondering, just "expedited" (which doesn't do much for your liquids or laptop).

I did see a guy having trouble, having supposedly had online checkin and a barcode on his phone somewhere, but it didn't work. And there was nobody at the Jetblue counters. And it was half an hour prior to his flight's departure.

Going to HKG is much easier, Depending on the class you are traveling, try to plan for a minimum of 6 hours of sleep. J class is more comfortable and easier to get a longer sleep, but I've been able to sleep very well in PEY also.

Try to align your wakeup time right before the breakfast meal service. Arrive in HKG and try to stay awake as long as possible until a regular hour in the evening, maybe 9PM. If you really need to take a nap, try and keep it short, 1-2 hours. Then pass out and hope to get a complete night of sleep without waking at 3AM. Next day you should start feeling very tired again in the evening. rinse/repeat. You should be fine in 2-3 days.

Like SilverChris said, fight the urge to sleep right after boarding. I see a lot of passengers doing this on JFK/EWR flights. Take a late nap the day before boarding the help stay awake for a few hours after takeoff.

Good luck coming back. I've not found a pattern that works to minimize the 4-6 days it takes to acclimate. Although that's on the flights back to NYC which usually depart late afternoon and arrive in the evening on the same day. HKG-YVR flight has a different pattern.