Maryland Gov. Martin O'Malley, center, plays with his band, O'Malley's March, in Baltimore in 2011. (Photo by Bill O'Leary/The Washington Post)

When O’Malley’s March takes the stage in Annapolis on Saturday, it will mark a milestone for the band’s 51-year-old frontman: the final scheduled appearance during his tenure as governor of Maryland.

Martin O’Malley’s Celtic rock band is booked for a pair of back-to-back shows at the Rams Head, a venue just around the corner from the governor’s mansion. The promoters are promising “a rollicking evening of traditional and original tunes, seasonal classics and general merriment.”

Formed in 1988, O’Malley’s March has seen a few personnel changes. But it has endured as its lead singer and acoustic guitar player moved up the political ladder, from his days as a brash Baltimore councilman, to his stretch as mayor of the challenged city, to his tenure as governor, which began in 2007.

With O’Malley gearing up for a potential 2016 White House run, the band has said little about its future plans, but O’Malley boosters expect it will continue to surface from time to time. An announced retirement of the band back when O’Malley was first running for governor didn’t stick.

On Tuesday, O’Malley’s political action committee sent out an e-mail to his supporters, reminding them of the 6:30 p.m. and 9:30 p.m. shows on Saturday. In the e-mail, O’Malley called the concerts “our final shows of 2014.”

Aides confirmed he has no plans to play again before Jan. 21, when O’Malley leaves office and Gov.-elect Larry Hogan (R) takes over. (O’Malley’s March played at both the 2007 and 2011 inaugural balls but seems unlikely to be included in the musical lineup for Hogan’s celebration.)

Tickets to Saturday’s shows are $25. As of early Wednesday morning, 45 remained available for the early show through the Rams Head Web site. In what could be a reflection of the band’s aging fan base, remaining tickets were far more plentiful for the late show.