“It’s Time for Christmas!” That’s the welcoming from MunOpCo Music Theatre with its annual concert of the season. Fifty-plus voices of the MunOpCo Mass Christmas Choir and special guests, The Royalaires big band, share the stage on Saturday at 8 p.m., and Sunday at 2 p.m., at the Scottish Rite Cathedral, 1533 Hamilton St., Allentown.

MunOpCo Christmas poster The MunOpCo Mass Christmas Choir will perform selections from various cantatas, while the Royalaires will present the best of Christmas harmonies led by vocalist Robin Sands-Seip. Husband Jim Seip will be on keyboard. Christmas favorites include “Feliz Navidad,” “Winter Wonderland” and “Santa Baby.”

“While the Royalaires regularly provide the Allentown/Lehigh Valley with free concerts, we don’t get to perform the holiday music we will present with MunOpCo,” said trombonist Russ Braun, director of the Royalaires. “Many wonderful and unique harmonies have been written specifically for the ‘big band.’ Even our regular audience will find these musical selections unfamiliar.”

For further info: munopco.org               royalairesbigband.com

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ARTS ROUNDUP

Genesius Theatre in Reading presents the award-winning Broadway musical, “Spamalot,” beginning Friday at 8 p.m., and running through Dec. 15. With book and lyrics by Eric Idle and a new score by Idle and John Du Prez, the comedy is based on the classic comedy film, “Monty Python and the Holy Grail.” “Spamalot” is the fresh Broadway hit and unorthodox parody of the Arthurian legend. It features numerous references to “Monty Python’s Flying Circus” TV skits and spoofs on some Broadway musicals.

Directed by L J Fecho, the cast includes Anita Lewis as The Lady of the Lake, Benjamin Ruth as King Arthur, Kevin Cooper as Sir Galahad, Christopher Sperat as Sir Robin, Alexander Krick as Sir Lancelot, Nate Matz as Patsy and Chip Rohrbach as Sir Bevedere. Music director is Andrew Cusano; chorographer is Jennifer Parker Scott.

For further info: genesiustheatre.org

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Act 1 at DeSales University in Center Valley brings to life “The Trial of Ebenezer Scrooge” by Mark Brown, now through Dec. 15, on the main stage of the Labuda Center for the Performing Arts. Directed by Steven Dennis, the play unfolds one year after Dickens’ classic year when Ebenezer’s epiphany has waned and he’s returned to his curmudgeonly ways. He files suit against Jacob Marley and the Christmas ghosts for kidnapping, slander and emotional distress. All leads up to Dickens’ classic characters taking the stand.

For further info: desales.edu/act1

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Now in its 24th year, Civic Theatre of Allentown’s signature holiday production of Dickens’ “A Christmas Carol,” with adaptation by Sharon Glassman and William Sanders, opens Friday through Dec. 21, at the Nineteenth Street Theatre. Ebenezer Scrooge, portrayed by Kirk Lawrence, must endure visits from three spirits, each one working hard to teach the old curmudgeon the true spirit of the season, all in the hopes that he will recapture some of his lost humanity.

There’ll be some new faces in the cast this year, plus a new set design by Jason Sherwood.

For further info: CivicTheatre.com

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Though Touchstone Theatre’s holiday classic, “Christmas City Follies,” is now in its 14 year in Bethlehem, there are new cast members and some new twists amidst the musical merriment. Joining “Follies” veterans will be Josh Neth, artistic director of Allentown Public Theatre, and Megan Schadler, a senior at the Lehigh Valley Charter Arts High School. Megan has performed with Touchstone regularly through its annual Young Playwrights’ Festival.

“Christmas City Follies XIV,” a high-spirited, vaudevillian variety show that draws its inspiration from Bethlehem, or “The Christmas City,” and the holiday season, begins tonight at 8, and runs through Dec. 22. Touchstone founder Bill George is back with “The Old Guy,” along with ensemble associate Mary Wright’s “Little Red,” and the “Pajama Sisters,” plus some fresh takes.

For further info: touchstone.org

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Lehigh University Choral Arts, under the direction of Steven Sametz and Sun Mi Lee, presents the annual free candlelight holiday celebration known as Vespers on Sunday at 4 p.m. and 8 p.m., at Packer Memorial Church on the Bethlehem campus. This year’s program ranges from folksongs to classics, along with readings and music to celebrate the season.

For further info: zoellnerartscenter.org

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The Bach Choir of Bethlehem presents “Christmas Concerts: What Sweeter Music,” with greatest hits from its “Christmas in Bethlehem” CDs on Saturday at 8 p.m., at First Presbyterian Church of Allentown, and on Sunday at 4 p.m., at First Presbyterian Church of Bethlehem.