Carolyn Haywood, author and illustrator, Betsy and Billy, 1941.
My local library doesn't have the entire series, but I seem to remember that Star is born during Betsy and Billy, after Betsy makes a special Christmas wish.
In Betsy's Little Star, Star is ready for kindergarten. Not that I've ever read this series, but I'm guessing it's either this title, about Betsy and her little sister Star, or one before it, since Star is 4 years old in this one.
I remember a set of books from the library when I was 10 years old in the early 70's about a little girl named Betsy. I think they were from the 50's-her mama was a homemaker, the policeman stood on the corner keeping an eye on things, you know, quaint stuff like that. These are not Betsy-Tacy, but I believe the name Betsy was on the title of each story. When the sister is born on Christmas day Betsy is allowed to select the name. There are several Betsy books, starting with B is for Betsy.
She had a baby sister, she lived in a small town, and the local policeman on the corner was her friend. I don't remember which one Star was born in, but I think it was the first one. Some of the other Betsy books are: Betsy Plays School, Betsy and the Circus, Betsy's Busy Summer, Back to School with Betsy, and Betsy's Little Star, which is Star's story.
Probably one of the many fans of the books will pin it down! There are several titles, and I have no idea which one has Star's birth in it, but it seems that Betsy's baby sister arrived at Christmas and was therefore named Star.
Looking for book I read around 1977, young adult - family celebrating Christmas gets snowed in and another family has to stay with them.The children are all crabby about this until they discover a trunk in the attic containg craft materials and they make all their own presents since they can't go out and buy.There are twelve titles in the series: "B" is for Betsy, (1939); Betsy and Billy, (1941); Back to School with Betsy (1943); Betsy and the Boys (1945); Betsy's Little Star (1950); Betsy and the Circus (1954); Betsy's Busy Summer (1956); Betsy's Winterhouse (1958); Snowbound with Betsy (1962); Betsy and Mr.Kilpatrick (1967); Merry Christmas from Betsy (1970); and Betsy's Play School (1977, illustrated by James Griffin). Betsy tells her mother that what she wants for Christmas is a baby sister. This is approximately book six in a series of Betsy books.