You are supposed to have the Christmas spirit this time of year, but with “Holiday Inn,” through Dec. 18, The Pennsylvania Playhouse, Bethlehem, you can celebrate many holidays with music by Irving Berlin.

The “Holiday Inn” musical, which premiered on Broadway in 2016, is based on the 1942 Bing Crosby, Fred Astaire movie.

The plot, which is just an excuse for the song and dance numbers, begins with Jim Hardy, Ted Hanover, Lila Dixon and the ensemble singing and dancing to “Steppin’ Out With My Baby-I’ll Capture Her Heart.”

Jim (Micah Henning) wants to marry Lila (Jenny Taylor) and move to a farm and house he purchased in Connecticut.

Right after she accepts, Ted (Trevor Colahan) and manager Danny (Gary Boyer) tell them they have booked a terrific six-week tour. To Jim’s disappointment, Lila says she will join him at the farm after the tour.

It looks like Jim will have trouble with the Mason Farm, as young bank messenger Charlie (Liam Griffith) keeps arriving with bills and notices. He does get to meet Linda Mason (Elizabeth Marsh-Gilkeson), who grew up there. The farm also comes with live-in fix-it person Louise (Denise Long).

Jim and Linda are drawn to each other, but he does not have much hope that he’ll be able to keep the farm, until his show business friends visit. They come up with the “Let’s put on a show” idea, but they are only available on holidays.

So that’s when the shows will happen. Linda has unfulfilled performance dreams, and she participates.

During the premiere, Ted unexpectedly appears on stage drunk and almost ruins it. Lila has left the act and he needs a new partner.

He found the perfect replacement when he was loaded onstage, but he can’t remember who it is. Of course, it is Linda. It turns out that Ted wants to take Linda to Hollywood for a movie about the Holiday Inn.

Things get complicated, but I don’t think I am giving anything away when I reveal that there is a happy ending.

Director Rody Gilkeson works with a cast of 25 to put on many dance numbers and present classic songs that include “Blue Skies,” “Easter Parade,” “Cheek to Cheek” and “White Christmas,” as well as some pleasing, less familiar Berlin songs. There are 22 scenes and many changes in the spectacular costumes, but things move very quickly.

Henning and Marsh-Gilkeson sing wonderfully, especially when they harmonize, and project a sunny optimism that goes well with the 1940s setting.

Colahan is not a strong vocalist, but his dancing upholds Ted’s claim that fancy footwork can win a lady’s heart.

Long is full of exuberance as Louise.

The cast captures the gee-whiz innocence of the “Golden Age of Broadway.”

With 26 songs, including reprises, “Holiday Inn” is two- and one-half-hours long, including intermission. But it needs all that time to cover the major holidays. If you are ready to enjoy all of them, The Pennsylvania Playhouse is the place to go.

“Holiday Inn,” 7:30 p.m. Dec. 9, 10, 16, 17; 3 p.m. Dec. 11, 18, The Pennsylvania Playhouse, 390 Illick’s Mill Road, Bethlehem. Tickets: www.paplayhouse.org; 610-865-6665.