It wasn’t even Halloween yet when a fully lit Christmas tree appeared in the living room window of a house in my neighborhood. It looked out of place flanked by houses draped in faux spider webs and pumpkins. I wondered what would posses the homeowners to get in the Christmas spirit so early, but according to one expert, the answer is pretty simple.

Christmas stuff makes people feel good and so does decorating for Christmas early–so go ahead and get the tree out before Thanksgiving if you want.

Why decorating for Christmas early makes people happier

“In a world full of stress and anxiety, people like to associate to things that make them happy and Christmas decorations evoke those strong feelings of the childhood,” psychoanalyst Steve McKeown told Unilad. “Decorations are simply an anchor or pathway to those old childhood magical emotions of excitement. So putting up those Christmas decorations early extends the excitement.”

As Unilad points out, McKeown’s theory is backed up by a study in The Journal of Environmental Psychology that examined how homeowners use exterior holiday decor to signal feelings of friendliness and connection to neighbors. When your neighbor puts up Christmas lights early, they’re basically saying, “I’m social and in the holiday spirit!”

If you’ve been itching to get your Christmas decor out of storage, there’s no time like the present. A string of lights and a “Happy Holidays” might even help you make friends with your neighbors.

Decorating for Christmas early also tends to bring up feelings of nostalgia. Pulling out your childhood ornaments can connect you with those feelings of Christmas morning excitement. Lighting that ceramic tree that sat on grandma’s mantle for eons might take you back to cozy family holiday celebrations. (You know the one I’m talking about. Every grandma in history has had one.) Just like how you naturally find comfort in your teenage playlists, psychologists have actually found that nostalgia can be really good for us. One study showed that it makes people feel more socially connected, boosts their self-esteem, and just increases optimism. (Seriously, who can’t benefit from a little of that right now?)

When we think back on those cherished holiday memories from our childhood, it evokes a really comforting sense of belonging and happiness. So by putting up those Christmas decorations early, people are able to kind of extend that nostalgic, feel-good experience throughout the whole season.

What about Christmas music?

Decorating early can make us happier, but overdoing Christmas music too early can have the opposite effect (so maybe don’t convert your whole playlist to holiday tunes just yet, especially if you’ve spent a holiday season or two working in retail).

“Music goes right to our emotions immediately and it bypasses rationality,” Clinical psychologist Linda Blair told Sky News. At this point in the season, we can apply the same rule to music and egg nog: small doses are best if we want to stay happy.

I’m sure the Christmas-enthused homeowners in my neighborhood are already cranking the festive tunes. My own tree isn’t up yet, but I’ve got to admit, the sight of theirs makes me happy every time I walk by.

Ready to decorate? Here are some ideas to get you started!

Balsam Hill Christmas Tree

Balsam Hill

Artificial Christmas Tree

$249

While we love the tradition of cutting down our Christmas tree, it’s not really an option when you’re decorating before the leaves fall. (Talk about a fire hazard by Christmas!) For early decorators, artificial is the way to go. And when it comes to artificial trees, Balsam Hill does it best. They’re impressively realistic and available in dozens of lit and unlit styles. From giant and full blue spruces to charmingly sparse alpine balsam firs, there’s something for every family style. And while they’re pricey up front, they’re also made to last for years.  And with the price of real trees ever increasing, they definitely save you money in the long run! Put it this way–Motherly’s VP of Finance says hers was “totally worth the high price tag.” We rest our case. (Pro-tip: If you don’t know which style to choose, opt for their branch sample kit.)

Prices start at $249

Wondershop 19.5 Neon Style Santa Christmas Light

Wondershop

19.5 Neon Style Santa Christmas Light

$34

Is this too much? I think not. Post him up in the window to signal that even if you’ve lost your mind, you still feel a little festive.

Wondershop Felt Ornaments Garland

Wondershop

Felt Ornaments Garland

$8

In a table scape, over a doorway, or across the mantle, this fabric ornament garland adds a simple pop of cheer. And it only costs $8!

Balsam Hill Lit Winter Flurry Snowflake

Balsam Hill

Lit Winter Flurry Snowflake Set of 2

$129

You go to so much trouble putting them up, you may as well decorate with pieces that don’t feel like they need to come down the day after Christmas. We love the look of these simple lit snowflakes that can hang around all the way until Valentine’s Day. (Because then winter can shuffle right along, thankyouverymuch.)

Wondershop Welcome Friends Tree Coir Doormat

Wondershop

Welcome Friends Tree Coir Doormat

$13.99

Wipe your feet, but do it in the holiday spirit, ok?

Wondershop 3pc Lit Metal House Decorative Christmas Figurine Set

Wondershop

3pc Lit Metal House Decorative Christmas Figurine Set

$8

Sure, collecting can be half the fun but sometimes you just want to knock it out in one fell swoop. These industrial metal housescome to life with tea lights tucked inside–just add in a few classic bottle brush trees and consider your holiday tabletop display done.

Threshold Christmas Set of 12 Mini Bottle Brush Trees

Wondershop

Bottle Brush Tree Collection

$15

Speaking of which, bottle brush trees are one of my favorite enduring holiday decorations. This set of 12 colorful tress of various sizes look adorable as part of your village or in clusters across the mantle!

A version of this post was published Nov. 20, 2017. It has been updated.