As others said, typical is to get slow meal service 1-1.5 hours after takeoff and before landing.

This is very sub-optimal on long night flights for getting enough sleep time as the meal services cutting possible sleep time drastically from both ends of the flight.

These days I skip the flight meal services on overnight flights, instead I eat well before the flight at the airport (lounge or self-paid), and just try to sleep thru the whole flight, ignoring the meal service interruptions during the flight. Airplane food is often not that great anyway, 3-4 hours more chance to sleep is worth much more to me.

PS. This in economy where I am always... The few times I have gotten an upgrade to business, I did try to enjoy all the services and meals to the max, and still got some sleep in the better seat ;-)