November 05, 2025 — Charlotte Pennington

Key Takeaways

  • Choosing comfort over formality makes your New Year's Eve party outfit feel more effortless and comfortable.
  • If you’re wondering what to wear to a casual party, vintage sweatshirts, soft PJs, baggy jeans, or casual dresses are all excellent choices.
  • Cali1850 offers hundreds of easy pieces that fit every kind of celebration and every version of you.

Glamming up with rhinestones and stilettos isn’t everyone’s vibe, and that’s okay. Memorable moments of NYE can happen in casual outfit ideas too, wrapped in soft fabrics and relaxed silhouettes as you enjoy a cozy gathering with your favorite people. 

If you’re planning to spend the last day of the year (and the beginning of the new one!) in comfort, these casual New Year's Eve outfit ideas from Cali1850 are just the thing for you. They’re ridiculously easy to put together, yet chic enough to look styled without the effort.

1. Basic Tee, Baggy Jeans & A Leather Jacket

Woman in baggy jeans, white tank, and leather jacket for New Year’s Eve

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You can’t go wrong with a well-fitted tee and baggy jeans as your New Year's Eve party outfit. A solid tank top or slim-fit T-shirt naturally complements the loose silhouette of the bottoms for a balanced outfit that plays with proportions

Cali1850 offers a variety of women’s classic jeans with unique details like embroidery, patches, and lived-in finishes, so your final fit stands out. Bring this casual NYE outfit idea to life with sneakers and subtle jewelry if you like. Throw on a leather jacket, and you’re done.

2. A Glam Jacket & Mini Skirt

Woman in leopard print jacket, white tee, black mini skirt, and boots for NYE

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Want a casual NYE outfit idea that’s even bolder yet just as comfortable? Reach for a statement jacket from Cali1850 with details like fringe or animal print, and pair it with a simple mini skirt and a fitted top. Add tights and knee-high boots (or sneakers to tone it down), and you’ve got a casual and glamorous look that’s perfect for cozy parties or watching fireworks with friends.

3. A Vintage Sweatshirt & Comfy Bottoms

Woman in a grey vintage sweatshirt and plaid skirt for New Year’s Eve

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Finding the right balance between cool and casual can be tricky for New Year's Eve. Lean into outfit ideas that exude nostalgia, and you’ve got an easy formula for feeling comfy without losing your sense of style

Get yourself a vintage boyfriend sweatshirt that looks like it has been loved for years, and team it with a mini skirt for an easy vibe. Add sneakers if you’re celebrating outdoors or fuzzy socks if you’re staying in with friends and fam.

4. The PJ Party Two-Piece

Woman dressed in comfy blue PJs as her New Year's Eve party outfit

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There’s no rule that says you can’t party it up on New Year's Eve in loungewear. It’s as casual an outfit idea as you can get. A matching set in poplin or a cozy sweatshirt and sweatpants combo from Cali1850 will make intimate gatherings feel all the more special. 

Picture pizza boxes on the table, soda bottles clinking, and you laughing up a riot with your friends as your realest self. Ditch the dress code and be unapologetically you!

5. A Casual-Chic Dress

Woman in a denim overall midi dress and white tee for New Year’s Eve

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If you’re in the mood for something a little dressier, just wear one of Cali1850’s chic dresses. It doesn’t have to be fancy to feel festive. A simple denim dress is the perfect outfitidea for what to wear to acasual New Year's Eve party while keeping things fun and elevated.

Whatever you put on, make sure it feels like you. Opt for relaxed styles that are comfortable and easy to wear. Need more casual New Year's Eve party outfit ideas? Cali1850 offers plenty of easy-going pieces to keep the good vibes going. Explore our women’s leisure clothing collection to find your next favorite!

FAQs

Can I wear jeans on New Year’s Eve?

Definitely. Jeans are one of the easiest pieces to dress up or down, if you’re wondering what to wear to a casual New Year’s Eve party. Try them with fitted tees, statement jackets, chic blouses, or even linen button-down shirts for elegance.

How do I make casual New Year’s Eve outfit ideas more festive?

Accessories are the answer. Glam up your look with bold jewelry, hair clips, embellished shoes, or a designer purse. 

What’s the luckiest color to wear on New Year’s Eve?

Gold and red are the traditional choices for inviting positive energy into the new year. But really, the luckiest color is the one that makes you feel confident.

Author Bio

With a strong belief in using fashion as a means for self-expression, Charlotte Pennington helps individuals embrace their unique personal style and showcase it through their clothing choices. From her early days flipping through fashion magazines to her adventures scouring thrift shops for hidden gems, fashion has always been her muse. Shaped by California’s iconic and relaxed fashion influences and armed with a pen and a keen eye for trends, Charlotte now shares her love for fashion through her writing.