Leap Day , Esfand 30. This day occurs in the Jalali calendar every four years as an extra day added to the end of the year to keep the calendar aligned with the solar year. In leap years, Esfand has 30 days instead of 29, allowing for more precise annual timekeeping. Leap Day holds significance in Iran for maintaining synchronization with the Earth's orbit around the sun, playing an important role in official and administrative planning. By adding this day, the Jalali calendar remains scientifically and practically in step with the actual solar year, preventing the accumulation of timing errors. The day is typically added in years divisible by four, marking a unique conclusion to the calendar year. For many individuals and organizations, Leap Day provides an opportunity to fine-tune schedules and annual activities with greater accuracy.
