The Michigan chapter of the American Civil Liberties Union (ACLU) on Monday filed a lawsuit seeking to force Michigan to recognize the marriages of more than 300 gay and lesbian couples who exchanged vows during the 24-hour window when such unions were legal in the state.

On March 21, U.S. District Judge Bernard Friedman ruled the state's marriage ban invalid. Clerks in four Michigan counties opened their doors the following day, a Saturday, to marry more than 300 gay couples before the Sixth Circuit Court of Appeals in Cincinnati suspended Friedman's decision as the state pursues an appeal.

While the federal government has said it will recognize the marriages as valid, Governor Rick Snyder said the state will not.

(Related: Obama admin says Michigan gay marriages will be recognized.)

The ACLU's lawsuit includes eight couples who married on March 22 in Michigan.

“By retroactively stripping Plaintiffs' marriages of legal recognition, the Governor has placed Plaintiffs and their families in an intolerable state of legal limbo that threatens their wellbeing, health, financial security, and family integrity, and denies their dignity as free and equal citizens,” the ACLU's lawsuit argues. “Absent relief from this Court, Plaintiffs will be unable to access critical protections and benefits for themselves and their families that are enjoyed as [a] right by all other couples who were legally married in Michigan.”

The ACLU is also suing Utah for not recognizing more than 1,300 gay couples who married after the state's ban was struck down in December.