Convert Month (month) to Year (y) instantly.
About these units
Month (month)
A month traditionally reflects the lunar cycle, which lasts about 29.53 days (a synodic month). Ancient cultures used lunar months to track seasons, religious festivals, and agricultural cycles. In modern civil calendars, however, months are fixed lengths of 28–31 days to maintain alignment with the solar year. This creates a hybrid system: culturally grounded in the Moon, yet functionally tied to Earth's orbit around the Sun. Months remain one of the most intuitive time units for planning—budget cycles, billing periods, academic schedules, subscription systems, and medical dosing regimens all rely heavily on monthly intervals.
Year (y)
A year is the time it takes Earth to complete one orbit around the Sun, approximately 365.2422 days. This value is not exact, which is why leap years exist. The year is the foundation of calendars, agriculture, climate cycles, financial planning, long-term engineering designs, and historical chronology. Its importance spans science, culture, religion, and economics. The modern Gregorian calendar year is an elegant compromise that aligns civil life with astronomical reality, minimizing drift between the calendar and the seasons. Despite its complexity, it remains the global standard for structuring long-term human activity.