That "one day of the year" just happens to be Christmas.
Yours is simply a lame attempt at rationalizing the blowing off of going to Church because Christmas falls on a Sunday and happens to inconvenience your fun in the worship of materialism. You'd probably be cooking up another lame excuse to blow off attending Church on Sunday if Christmas fell on a Saturday.
"Not forsaking our assembly, as some are accustomed; but comforting one another, and so much the more as you see the day approaching." Hebrews 10:25
"Shame on some of you..."
Save some of that loathing for yourself, kid. I'd like to witness the defense you attempt to mount for your spiritual sloth during your particular judgment. "But God, I HAD presents to open!"
"And we charge you, brethren, in the name of our Lord Jesus Christ, that you withdraw yourselves from every brother walking disorderly, and not according to the tradition which they have received of us." 2 Thessalonians 3:6
Merry Christmas to you.