The status of same-sex marriage in California is unique among the 50 U.S. states, in that the state formerly granted marriage licenses to same-sex couples, but has discontinued doing so. The period of granting such licenses began on June 16, 2008, due to a ruling by the Supreme Court of California based on an equal protection argument and ended November 5, 2008, due to the passage of Proposition 8, an amendment to the California Constitution that limited marriages to those between one man and one woman. Before the passage of Proposition 8, California was only the second state to allow same-sex marriage. Marriages granted by any civil entity, foreign or otherwise, anytime before the passage of Proposition 8 remain legally recognized and retain full state-level marriage rights. Subsequent state legislation established that any same-sex marriages granted by other jurisdictions after the passage of Proposition 8 retain the state rights that come with marriage, except for the legal term "marriage" itself.