The chest and trapped chest use the same texture when the computer is set between December 24 and 26 (Christmas), making them impossible to distinguish during December 24 to 26.
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Affects 20w49a
Affects 20w51a

Also minecart with chest items don't use the chrismas chest texture but the minecart with chest entity does
@unknown See MC-168739, unfortunately it is resolved as won't fix.
Affects 21w11a
LD_PRELOAD=/usr/lib/faketime/libfaketime.so.1 FAKETIME="2020-12-24 20:30:00" FAKETIME_DONT_FAKE_MONOTONIC=1 minecraft-launcher
Change date on Linux without messing system up ^

My mod Better Christmas Chests fixes this issue: https://www.curseforge.com/minecraft/mc-mods/better-christmas-chests
Can also confirm this in 1.18.1. I've attached a screenshot that demonstrates this.
[media]This issue has been fixed for ender chests in 22w03a as stated in the 22w03a changelog.
Ender chests are no longer gift wrapped around Christmas

I don't believe the issue for ender chests is fixed as one of the devs purposefully added the functionality for enderchests to get gift wrapped. A better fix would be to just draw a purple present to match the with the existing gift texture.
Also trapped chests still use an identical texture to normal chests making it impossible to tell the difference. A previous bug report was fixed by making the trapped chest have the gift wrapped texture but using the same identical texture just doesn't work.
Also the chest minecart still uses the default texture and never shows gift wrapping.
I know these are probably just QoL fixes and you have more important things to worry about but this has been open for ages and you have only half fixed it. And in my opinion that fix made it worse.
Also the chest minecart still uses the default texture and never shows gift wrapping.
That's MC-168739 which is Won't Fix.

Can confirm in 1.18.2.

Duplicate of MC-92999? (which was closed as WAI)

Can confirm in 23w03a

Affects in 1.20.1 & 1.20

Can confirm in 1.20.2 and 23w43b.

Can confirm in 1.21.4.
Relates to MC-42150 and MC-123536.