Millie Fleur's Worst Day Ever

Millie Fleur

by Christy Mandin

Wednesday Addams meets Alexander and the Terrible, Horrible, No Good, Very Bad Day in the latest book in the New York Times bestselling Millie Fleur series! Garden Glen was buzzing with excitement. It was time for the town's annual Butterbloom Fest! Everyone was ready for the most perfect day of the year.Everyone except Millie Fleur La Fae. Instead of waking up bright-eyed and ready to take in everything the fair has to offer, Millie Fleur wakes up with a bad case of the morgenmuffels. Even worse, there's a humbug tangled in her hair!Millie Fleur's day goes downhill from there. Even as she tries to make the best of things, her problems grow bigger and bigger. Will a little help from her friends be enough to turn this bad day around?Millie Fleur's Worst Day Ever reminds us all about the importance of relying on our friends when we're feeling blue. A gorgeous companion to the New York Times bestseller Millie Fleur's Poison Garden.

Genres: Picture Books, Childrens, Friendship, Fantasy, Storytime, Fiction

40 pages, Hardcover

First published October 6, 2026

Reviews

[Suhasa · Rating 4.25 out of 5]

Wholesome and cute. Amazing illustrations as always.

[Erika · Rating 4 out of 5]

Oh Millie, I so get you! This book had a solid message: the importance of leaning on loved ones when we are in trouble or simply feeling blue. Everyone can have a day that seems to get worse as it goes, but if we are able to ask for help, it might just get a little easier. I think it is a very important message for a society that focuses more and more on individualism. Children are our future, and if they learn to trust one another and to collaborate, maybe the world will be a better place.

[Diana · Rating 4 out of 5]

A story to remind us of not letting bad things ruin our day, to ask for hep when we need to, and to remember about all the amazing people around us.

[Melanie Dulaney · Rating 5 out of 5]

First, Millie Fleur had to show the townspeople of Garden Glen that sometimes things (and people) with unique and sometimes weird qualities can be wonderful. In her second book, the dark proves to be interesting and not so scary after all. The pumpkin patch installment in Millie’s books features squash of all sorts and combines reminders of the lessons in earlier books and continues the wonderful illustrations, alliteration, friends and fun from the first two. My fourth Millie-book has our hard-working, lover of the unusual anticipating the town’s annual Butterbloom Fest, her first, so she really wants to experience and participate in every aspect of the celebration. But in a turn with shades of similarity to Alexander’s terrible day, Millie’s begins with a bad case of the Morgenmuffels (little ugly-cute monsters crawling all over and around her) and a humbug tangled in her hair. Her entry in the cake contest turns into a pile of oozing ick and her big ol’ duffle bag of festival necessities causes her to trip and spill everything. But friends are a wonderful thing and several of Millie’s jump in to help her fix the mess and enjoy the perfect pet parade without humbug hair and despite the icky baked beast.

Another altogether wonderful picture book and any library serving PreK-grade 3, whether home, school, or public, needs to have all four Millie books and librarians should be watching for more installments. (I’d love to see how Millie and Garden Glen celebrate winter holidays!)

Thanks, Scholastic, for sending this new release in school book fair trucks even before the actual publication date!!

[Elisabeth · Rating 4 out of 5]

This is my favorite of the three Millie Fleurs I've read, perhaps because it's the problem I'm closest to right now. (I'm not afraid of the dark, and I have no problem with being different.) Millie wakes up with the blues, and everything is going wrong. And it seems especially cruel because she had such high hopes for the perfect day. Her cake flops, and her plant is not ready for the competition at the fair. Her mother and friends offer to help, but she pushes them away. Eventually she realizes she does need help and asks for it. Her friends cheer her up and save the day. An excellent picture of depression or just simple poutiness. We all get that way sometimes. And the answer is to ask for help.

[Jenny Strange · Rating 5 out of 5]

Millie Fleur is so excited for the Butterbloom Fest and all of her amazing contributions to the day! But, boy, do things go wrong when she wakes up the morning of the event with a case of the morgenmuffels and with a humbug in her hair!
And things just seem to go downhill from there!
This adorable picture book is a sweet reminder that we all have bad days, but when you have people who love you, you don’t have to carry the weight all by yourself.

MILLIE FLEUR’S WORST DAY EVER is an important reminder to kids and adults alike: we all need a little help from our friends.

[Kimberly · Rating 5 out of 5]

4.5 stars rounded to 5 because of the illustrations. Make sure that you read the author's note as it will shed more light on what the German word, morgenmuffel, means making the story and the friendships even sweeter. Not only a great book to discuss with kids regarding setbacks that happen throughout the day and not letting them set the tone for the ENTIRE day, but the power of having friends and BEING a good friend that helps get you through days that feel like nothing is going right. As always, I love the illustrations.

[Skylar Tichenor · Rating 4.75 out of 5]

I like how the story encourages children to work through difficult moments and understand that having a bad day does not mean everything is bad. It can help children learn about handling their emotions, being patient, and looking at situations from a different perspective. As a future teacher, I would use this book in my classroom to help students understand that everyone has bad days and that it is important to show kindness and understanding toward others. It would also be a great way to start a discussion about feelings and healthy ways to handle frustration.

[Alicia · Rating 4.5 out of 5]

Ultimately when things go wrong, you have to find your friends and that's what Millie Fleur has to do when she gets ready to attend the best festival day in her new hometown but everything doesn't go right from start to finish. Oh well, sometimes it's better to join 'em if you can't beat 'em and that's what Millie Fleur's friend teach her in this quirky addition to Mandin's story about the little girl who loves her oddities.

[Susan Rose · Rating 4 out of 5]

I thought that Millie Fleur was a one off. I didn't realize that she was a series.

She's a fun and non creepy Wednesday Addams for the preschool set. She is very matter of fact about the gentle monstrosities that surround her.

But more importantly, she has real friends (yes, they are human). And this is important.

This is a sweet book about awkward monstrosities but it has some real SEL cred. Surprising and satisfying if you're an adult, and seamless if you're a kid.

[Theresa · Rating 4 out of 5]

Millie Fleur's Worst Day Ever by Christy Mandin
Found on youtube as
This book was suggested as books for 2026
Millie Fleur's Worst Day Ever by Christy Mandin; read aloud for story time on Jenniferreads.
The best day ever had a lot of pressure. The book shows how to adapt to difficult things and continue your plans. The book shows that distractions, and grumpy moods make things hard.

[Dr. Julie Wasmund Hoffman · Rating 3 out of 5]

Millie has a bad day and it turns around with help from some friends.

[Sarah · Rating 5 out of 5]

I love the Millie books so much, and I just so happened to read this on a day where I, too, woke up with a case of the morgenmuffels! What a great reminder of all the ways we can help ourselves when everything just stinks.

[Sara · Rating 5 out of 5]

Fantastic book! This entire series is so beautifully illustrated and written. I love the author’s note to the kids at the end. Just such a lovely book series.

[Allie · Rating 4.5 out of 5]

Been there, Millie Fleur! I've been having a case of the Morgenmuffels myself of late.

[AnneLibrarian · Rating 4 out of 5]

Love this character! Use her garden book in book in a library program. Always a fun one to recommend.

[Pam · Rating 4 out of 5]

Mandin shows how Millie Fleur turned a miserable start to a day to an amazing one with the help from her friends.

[Stephanie ((Strazzybooks)) · Rating 4.5 out of 5]

I love Millie and her vibe. This one had good messages about life being hard and heavy sometimes, and how it's important to lean on our friends during those moments and just roll with it.