Thing is, by doing this they get free ads.
You saw it, you posted it here, 50 or more people saw it, someone will probably repost it further. The earlier they do it, especially if they're the first ones to do so, the more likely it is that someone will post a picture on social media, or tell their friends.
If you want it to stop, make doing it not profitable, just ignore it.

No problem, just wait a couple of years and it will line up correctly again. So that last Xmas I gave you my heart you will have been eating the chocolate from present Xmas and present Xmas you eat the chocolate of future Xmas. Let me know if you have any questions.

Anyone caught selling Christmas stuff before Halloween should be hung in a gibbet as a Halloween decoration.

There’s been some Halloween bits appearing round here but nothing Christmas…yet.

One of the supermarkets did have a big “back to school” display before August had even started.

On the one hundred and thirty-nineth day of Christmas, my true love gave to me...

That's just taking the piss. For me it only reinforces the will to buy less and less of this shit.

I don't really care about premature selling of Christmas stuff, some people do like to get ahead and I get it. However Christmas decoration prematurely is a big no

Poor Halloween. Always gets marginalised by Spendmas.

I get pissed when xmass shows up before holloween. honestly I get annoyed about it until its actually december.