Turning the big 4-0 is a momentous occasion, and as with any age milestone, it calls for finding the ultimate 40th birthday gift ... to be one of her favorite gifts. It combines numerology ...

but we think that they are perfect to mark a 40th birthday, too. We love the idea of gifting this bold red dress to help signify a fun new chapter. It's perfect for parties and cocktail hours to come.

If you have a friend, partner, or family member whose 40th birthday is approaching ... we've rounded up our favorite gift ideas in every category. Our own editors have vetted most of these ...