Bolivia put a backward-running clock on its congress building

A sundial can run the other way

A clock’s direction is not dictated by time itself. The familiar clockwise motion matches the way a shadow moves across many traditional sundials in the Northern Hemisphere. In parts of the Southern Hemisphere, the Sun’s path across the sky produces the opposite sweep.

In much of Bolivia, the Sun is often to the north around midday. On a horizontal sundial, that puts the shadow toward the south at noon. As the Sun travels from east to west, the shadow shifts from west, through south, toward east—counterclockwise when viewed from above. A reversed clock imitates that motion.

A local gesture, not a new time system

Some Bolivian municipal clocks have been set to turn counterclockwise as a visible way to reflect the Southern Hemisphere rather than treat the north’s convention as universal. The reversal changes how the hands travel around the face; it does not change what the numbers mean or how people tell the time.

Nor would the same sundial pattern apply everywhere in Bolivia at every season. The country spans tropical latitudes, where the Sun’s midday position shifts during the year. The reversed hands are therefore best understood as a regional symbol grounded in a real difference in how sunlight and shadows move—not as a requirement for clocks south of the equator.