When the Affordable Care Act was passed by Congress in 2010, Oct. 1, 2013 — one of the health care law’s key dates — seemed a long way off.

Now, only days away from the launch of the federal government’s first-ever health insurance marketplace, here’s a look back at some other important dates.

2008: U.S. Sen. Barack Obama campaigns for president on a platform of health care reform.

Jan. 20, 2009: President Barack Obama takes office.

July 14, 2009: The U.S. House of Representatives introduces an early version of the Affordable Care Act called America’s Affordable Health Choices Act of 2009.

March 23, 2010: The Patient Protection and Affordable Care Act is signed into law by the president. “Today, I’m signing this reform bill into law on behalf of my mother, who argued with insurance companies even as she battled cancer in her final days,” Obama said.

Nov. 2, 2010: Republicans gain control of U.S. House of Representatives during mid-term elections.

Jan. 19, 2011: The House of Representatives holds its first vote to overturn the ACA.

Jan. 31, 2011: A federal judge in Florida rules that the Affordable Care Act is unconstitutional. Twenty-six states challenge the law’s legality.

March 10, 2011: In an executive order, Gov. Nikki Haley establishes the South Carolina Health Planning Committee with a $1 million federal grant to decide whether the state should establish its own health insurance marketplace under the law.

March 26-28, 2011: The U.S. Supreme Court hears three days of oral arguments regarding the law’s constitutionality.

March 31, 2011: In an email to her top advisers, later obtained through a Freedom of Information Act request by The Post and Courier, Haley wrote the object of the South Carolina Health Planning Committee “should be to figure out how to opt out and avoid a federal takeover, NOT create a state exchange.”

June 28, 2012: In a 5-4 vote, the Supreme Court upholds the law’s constitutionality, but rules that states are not obligated to accept federal money to expand Medicaid.

June 28, 2012: Haley and S.C. Medicaid Director Tony Keck hold a news conference about the Supreme Court’s ruling. “What was bad policy yesterday is bad policy today,” Haley said. “There is only one solution, and that is new leadership in Washington. We have to have a new Senate, and we have to have a new president.”

Nov. 6, 2012: Obama is elected to a second term.

Nov. 15, 2012: In a letter to U.S. Department of Health and Human Services Secretary Kathleen Sebelius, Haley writes that the South Carolina Health Planning Committee has decided the state should not establish its own health insurance marketplace and will opt into the federally facilitated marketplace.

March 12, 2013: The S.C. House of Representatives debates Medicaid expansion for hours, ultimately rejecting a proposal that would have provided health insurance next year to some 344,000 residents who earn up to 138 percent of the federal poverty level.

July 2, 2013: The White House announces that a mandate under the law requiring large employers with 50 or more full-time employees to offer affordable insurance will be delayed one year.

Aug. 2, 2013: S.C. Department of Insurance Director Ray Farmer says health insurance premiums could increase by 70 percent under the new law.

Oct. 1, 2013: The federal health insurance marketplace opens enrollment at healthcare.gov.

Jan. 1, 2014: Coverage under health plans purchased through the federal health insurance marketplace to begin.

March 31, 2014: Open enrollment on the federal insurance exchange to close.

Reach Lauren Sausser at 937-5598.