Launch the game on February 29, 2024, to unlock the "Bissextus" achievement in 2024. *** Bissextus is an ancient term for a leap year in the Roman calendar. The term comes from the Latin "bis sextus," which means "twice sixth day." A leap year adds an extra day to February to synchronize the calendar with the solar year. The concept of a leap year was introduced in Ancient Rome, where an extra day was added every fourth year to compensate for the extra six hours in the year that were not accounted for in the regular 365-day calendar. This allowed for consistency between the calendar and the seasons. Today, the concept of a leap year is widely used in the Gregorian calendar, which we currently use. It mandates the introduction of a leap day if the year is evenly divisible by 4, except for years that are evenly divisible by 100 but not by 400. This complex algorithm ensures precise alignment of the calendar with the duration of the solar year. In the modern world, a leap year is important for maintaining order in our time measurement. Without it, dates would quickly become misaligned, and our calendars and clocks would be out of sync with natural cycles. Thus, while the term "bissextus" may sound archaic, its significance for our everyday lives remains undeniable. *** The next possible date to unlock this achievement is February 29, 2028.