Daylight saving time changes in South Dakota, United States

South Dakota has 2 listed IANA time zones. 2 observe daylight saving time changes in 2026.

Best Time to Call South Dakota

Business hours in South Dakota (9 AM-5 PM local time) fall at these local times elsewhere:

• Sao Paulo: 11:00 AM - 7:00 PM ( Convenient)
• Frankfurt: 4:00 PM - 12:00 AM (next day) ( Partial overlap)
• Johannesburg: 4:00 PM - 12:00 AM (next day) ( Partial overlap)
• Singapore: 10:00 PM - 6:00 AM (next day) ( Outside normal hours)
• Hong Kong: 10:00 PM - 6:00 AM (next day) ( Outside normal hours)
• Istanbul: 5:00 PM - 1:00 AM (next day) ( Partial overlap)
• Auckland: 2:00 AM (next day) - 10:00 AM (next day) ( Outside normal hours)

Times shown reflect current UTC offsets and may shift by up to an hour around daylight saving transitions.

Current Time in Cities of South Dakota, United States

About Time in South Dakota

The Town Split Down the Middle

South Dakota is roughly halved between Central time in the east and Mountain time in the west, with the boundary generally tracing the Missouri River until it reaches the state capital, Pierre, where the line continues south while the river itself bends southeast. That divergence produces one of the odder results of American time zone mapping: the small city of Fort Pierre, sitting just across the river from the capital, is itself split by the boundary, with its northern half on Mountain time and its southern half on Central time, according to the exact federal statute defining the line. Few American cities of any size are divided this way, with residents on opposite ends of the same town technically keeping different clocks for part of the year.

The boundary itself was defined with unusual precision by federal regulators, who described it as following the Missouri River south from the North Dakota line to a specific historic railway crossing near Pierre, then cutting southwesterly to the corner of a particular survey section in Jones County before continuing south along county lines to the Nebraska border. That level of surveyor's detail reflects just how much the boundary had to bend and thread its way through existing towns and counties rather than following a single clean geographic feature for the length of the state.

A Bill That Almost Passed, Then Kept Failing Anyway

South Dakota lawmakers have tried repeatedly since at least 2016 to lock the state into permanent daylight saving time, and the closest they came was on their very first attempt. Senate Bill 60, introduced that year, would have made daylight saving time the state's permanent year round clock; it cleared committee comfortably but failed on the Senate floor by a single vote, 17 in favor to 16 opposed, short of the majority needed to pass. Supporters argued at the time that South Dakotans were simply tired of losing weeks to adjustment every spring and fall, and pointed to Arizona and Hawaii as states already managing fine without the twice yearly change, though those two states had opted for permanent standard time rather than permanent daylight time.

Subsequent sessions produced a steady stream of similar bills that took a more cautious approach, written as trigger laws rather than immediate changes. House Bill 1214 in 2021 and House Bill 1042 in 2022 both proposed that South Dakota would permanently observe daylight saving time only once the state attorney general certified that federal law had been amended to actually allow it, since current federal statute permits states to opt into permanent standard time but not permanent daylight time without an act of Congress. Each of these bills has stalled at some stage of the process, leaving South Dakota, like most states pushing the same idea, still legally required to change its clocks twice a year while its legislature waits on Washington to make the first move.

A Mountain Chosen for Its Light

When sculptor Gutzon Borglum went looking for a site to carve the likenesses of four American presidents into the Black Hills, the decision that ultimately mattered most was not the size of the rock but the direction it faced. Borglum initially favored a nearby formation called the Needles, but rejected it once he judged the granite too thin and fractured to support large scale carving. He settled instead on the peak that would become Mount Rushmore specifically because its southeast facing surface caught direct sunlight for most of the day, an arrangement the National Park Service itself has described as an ideal lighting condition for both the carving process and the finished monument.

That orientation shaped the entire fourteen year construction effort that followed, from ground breaking in October 1927 to the final work halted by lack of funding in October 1941, the same year Borglum himself died and left his son Lincoln to complete the project. Because the mountain absorbed strong sunlight through most of the working day, crews of about thirty men at a time, roughly four hundred in total over the life of the project, were able to see the emerging details of each face with enough clarity and contrast to carve with precision, a practical benefit of solar geometry that Borglum had recognized from his very first scouting trips through the Black Hills.

Frequently Asked Questions