National Lighthouse Day falls on 7 August, the anniversary of the Lighthouse Act of 1789 — the ninth act of the First Congress, and the law that put every lighthouse in the young United States under federal care. The observance itself is much younger: Congress named the date in 1988, for the following year’s bicentennial, and has never made it permanent.

What National Lighthouse Day marks

National Lighthouse Day is an American observance held every 7 August. It is not a day off work, and no federal agency runs it: the day is kept by lighthouse museums, friends groups, coastal towns and the preservation societies that now own most of the surviving towers. What it commemorates is precise — an act of Congress signed on that date in 1789, which made aids to navigation a federal responsibility instead of a state one.

That precision is worth holding onto, because the day is often described as though Congress created it in 1789. It did not. The Lighthouse Act and the observance that honours it are separated by 199 years, and the second exists because somebody wanted to mark the bicentennial of the first.

The Act of 1789, and the day that came 199 years later

On 7 August 1789, President George Washington signed An Act for the Establishment and support of Lighthouses, Beacons, Buoys and Public Piers — the ninth act ever passed by the First Congress. It took the twelve lighthouses the colonies and states had already built and made the federal government responsible for their support, maintenance and repair. Historians often call it the country’s first public works programme; it also created the lighthouse establishment that eventually became the United States Lighthouse Service.

The observance arrived 199 years later. Senator John H. Chafee of Rhode Island introduced a joint resolution on 28 April 1988, cosponsored in the House by Representative William J. Hughes of New Jersey, and President Ronald Reagan signed it as Public Law 100-622 on 5 November 1988. President George Bush then issued Proclamation 5993 on 19 June 1989, and the first National Lighthouse Day was observed that 7 August — the bicentennial of the Act.

There is a catch that most write-ups miss. Public Law 100-622 designated 7 August 1989 and nothing beyond it. A Senate resolution in 2013 did the same for a single year, under the longer name National Lighthouse and Lighthouse Preservation Day. Congress has never designated the date in perpetuity, so the day continues on nothing more official than the will of the people who keep it.

Do lighthouses still do anything?

The first lighthouses were open fires of wood or coal burned on a headland, and the technology crept forward for centuries: candles, then whale oil lamps, then mineral oil. The real leap was optical rather than chemical. Augustin-Jean Fresnel’s stepped lens, first lit at the Cordouan lighthouse in France on 25 July 1823, gathered light that had been escaping in every direction and threw it at the horizon. Electrification followed, and today most active lights run a small LED optic off solar panels.

Satellite navigation did not switch the lights off. Many towers are still charted, still lit and still maintained by the Coast Guard as aids to navigation, precisely because a visual mark keeps working when an electronic one fails. What ended was the job, not the light: the lamp is now a sealed unit that reports its own faults, and nobody climbs the stairs at dusk.

Who owns a lighthouse now

Automation left a second problem: hundreds of granite towers, keepers’ houses and boat sheds that the Coast Guard no longer needed and could not afford to maintain. The National Historic Lighthouse Preservation Act of 2000, Public Law 106-355, signed on 24 October 2000, built a route out. A light station declared surplus is offered first, at no cost, to public bodies and non-profits willing to preserve it and allow the public some access; anything nobody takes goes to public auction.

The programme works. By 2021 the General Services Administration counted more than 140 light stations conveyed: 81 handed over free to public stewards, and 65 sold at auction for over 8.1 million dollars, which the Coast Guard puts back into navigation aids. What the new owners inherit is a bill — restoration projects, salt-stripped ironwork, and the fundraising efforts and education programmes needed to pay for them.

How the day is actually kept

Nobody organises National Lighthouse Day centrally, which is why it looks different everywhere. Individual lighthouses and the groups that run them decide what to do: free tower climbs, open keepers’ quarters, talks by former Coast Guard crew, a lens polished and lit for the evening. Local events are advertised through maritime museums and historical societies rather than any national calendar, and #NationalLighthouseDay carries most of the traffic on social media.

It is worth not confusing this with Maine Open Lighthouse Day, a separate and much larger event held on the second Saturday in September — 12 September 2026 — when the Coast Guard, the Maine Office of Tourism and the American Lighthouse Foundation open more than twenty towers that are shut the rest of the year.

How to mark 7 August

Most of what is worth doing on this day happens at a specific tower, run by a specific group of volunteers. Plan around them.