40 Best 40th Birthday Gift Ideas for Her and for Him

This thoughtful and affordable (under $6!) card includes fun facts to take them back to their birth year — from popular TV shows, to hit songs, and the price of basic household items. One happy customer wrote, "I love this card, it definitely brought back memories to the gifted! My only wish is they made this exact card for every birth year!"

RELATED: Best "Happy Birthday" Wishes for Your Best Friend

You don't have to spend a fortune to buy her a piece of jewelry she'll always associate with her 40th. This charm made from sterling silver features cubic zirconia detailing and can easily attach onto any bracelet or necklace she regularly wears.

This candle derives its humor from a cheeky message printed in the style of an optometrist's chart.

This waterproof bag is perfect for storing makeup or other essentials like tech accessories and toiletries. It offers a sweet reminder of their birth year, and how special they are to you.

This versatile hat can be used outside while she's gardening, hiking, or simply reading a book. However she decides to spend her time outdoors, it'll offer 50+ UPF, which is the highest rated sun protection possible.

RELATED: Best Gardening Gifts for the Plant People in Your Life

For the recipient who loves to stay organized, this sleek wallet is designed to hold all her essential cards, bills, and loose change. It's made with luxurious Italian leather, and can be monogrammed in gold foil to take it over the top.

This unique book, which features covers of The New York Times from every birthday they've had, has over 1,000 5-star reviews. Customers loved the quality, which is fitting for a coffee table book, as well as how it sparked conversation.

We recommend giving him these funny socks in the morning so he can wear them throughout his birthday. They're also subtle enough that he can wear them long after the celebrations end.

Experienced chefs know that Meyer lemons are a key ingredient for many drinks, condiments, and desserts. This plant will produce the lemons when put near any window, and as a bonus, the white flowers it grows are a natural air freshener.

This humorous vintage-inspired tee feels custom since it celebrates the recipient's year of birth. It's budget-friendly at under $20, and is available in a range of colors and styles to choose from.

If the recipient of your gift deals with a lot of stress, this self-care box could offer some much-needed healing. Each box comes with a curated selection of products that provide tools and activities for anxiety and other mental health challenges.

This cup set can be used for any beverage, but it's especially great for iced coffee since it comes with a sealed bamboo lid and glass straws. It's customized with their birth year, and includes fun facts to read while they sip.

At a time ripe for reflection, this daily guided journal is designed to help the recipient nurture the best version of themself. It has a prompt for each day, intended to promote self-love, self-improvement, and growth.

Nothing says relaxation like a plush robe, and this best-seller from Pottery Barn can be monogrammed with his initials for an added fee of $15.

If they're nostalgic for '80s fashion, they'll be thrilled that fanny packs are back in style (now labeled as belt bags). This one from Lululemon is water-resistant to keep all their belongings safe no matter the conditions.

If your budget allows, this carry-on suitcase from Monos will upgrade their luggage to include all the bells and whistles they could possibly need. It features a dent-resistant polycarbonate shell, TSA approved lock, and 360 degree turning wheels, plus a variety of fun colors to choose from like Sage, Purple Icing, and Banana Pudding.

Anyone who's turning 40 is sure to experience a rush of emotions when gazing at this cassette print. The tapes showcase some of the best and biggest artists from 1983.

Sure, Oh! The Places You'll Go is great for a graduation gift. But this cheeky version of the Dr. Seuss classic is perfect as a 40th birthday gag gift.

This gift box is filled with retro candies from 40 years ago. It'll take them right back to fond memories of grade school, summer camp, birthday parties, and trips to the mall.

This is no ordinary jigsaw puzzle. Completing it will assemble a front page of The New York Times from a special date in history (like their birthday!).