Kristy, Mary Anne, Claudia, and Stacey are best friends and founding members of The Babysitters Club.
Whatever comes up - cranky toddlers, huge dogs, scary neighbors, prank calls - you can count on them to save the day.
Babysitting isn't always easy though, and neither is dealing with strict parents, new families, fashion emergencies, and mysterious secrets.
But no matter what, the BSC have what they need most: friendship

Kristy's Big Day is the sixth book in The Baby-Sitters Club series.

Kristy's mom is getting married, and Kristy's a bridesmaid.

The only trouble is, fourteen little kids are coming to the wedding, and they all need baby-sitters. Here comes the Baby-sitters Club!
Stacey, Claudia, Mary Anne, Dawn, and Kristy think they can handle fourteen kids. But that's before they spend five days changing diapers, stopping fights, solving mix-ups, righting wrongs...and getting sick and tried of baby-sitting!
One thing's for sure: This is a crazy way to have a wedding. But it's a great way to have a lot of fun!