April 11, 2001 — Seven same-sex couples, denied marriage licenses, sue in Suffolk Superior Court in Boston to challenge the state's gay marriage ban.
May 8, 2002 — Suffolk Superior Court judge rules against granting marriage licenses to the seven gay couples, saying the legality of same-sex marriage should be decided by the Legislature, not the courts.
July 17, 2002 — Lawmakers adjourn constitutional convention without taking a vote on amendment that would have banned gay marriage in the state. The amendment was initiated by a petition signed by 130,000 citizens.
March 4, 2003 — The state Supreme Judicial Court hears arguments in case brought by the seven gay couples to legalize same-sex marriage.
Nov. 18, 2003 — The SJC rules it is unconstitutional to bar gay couples from marriage and gives the Legislature 180 days to come up with a solution to allow gays to wed. President Bush, in a visit to London, criticizes the decision and vows to work with Congress to "defend the sanctity of marriage."
Dec. 11, 2003 — The Massachusetts Senate votes to ask the SJC if Vermont-style civil unions would satisfy the court's decision legalizing gay marriage.
Feb. 4 — The SJC clarifies its earlier ruling, saying only full, equal marriage rights for gay couples — rather than civil unions — are constitutional.
Feb. 11 — Massachusetts Legislature opens constitutional convention with debate on a proposed constitutional ban on gay marriage.
Feb. 12 — Lawmakers adjourn convention deadlocked after failing to pass three separate proposed bans on same-sex marriage.
March 11 — Lawmakers recess constitutional convention but come steps closer to passing a proposed constitutional amendment that would ban gay marriage and allow for civil unions. Legislators agree to reconvene on March 29.
March 29 — State Legislature approves proposed constitutional amendment that would ban gay marriage but legalize Vermont-style civil unions.
May 17 — Same-sex weddings scheduled to begin across Massachusetts.