In 1654, Dutch scientist Christiaan Huygens invented the first pendulum clock, significantly advancing timekeeping technology. Before this, clocks were far less accurate. The pendulum clock's precision, accurate to seconds per day, transformed daily life by enabling reliable scheduling and improved navigation. Mariners used it for determining longitude, enhancing sea travel safety. Huygens' invention laid the groundwork for future horological innovations and helped standardize time measurement globally.