Thats the same day my missus arrives !
I was out there just before xmas and flew KLM via amsterdam, pretty good journey, but I flew via London city rather than one of the biggies
The long haul between Ams & manilla was nice though, had 3 seats between two people on the way out and 3 seats all to myself on the way back.
What I would suggest is if you are almost ready to take off and you spy an empty 3 seats either jump in them prior to take off or as soon as the seatbelt light goes out get in there, that way you can get some sleep laying out.
But you gotta be quick and a bit cheeky but 13 and a half hrs of comfort is worth it
