Is annual 365 days

Yes, "annual" typically refers to a period of 365 days, representing one complete year based on Earth's orbit around the sun. However, more precisely, an annual period encompasses either 365 days in a regular year or 366 days in a leap year, since the actual solar year is approximately 365.25 days long. When something occurs "annually," it happens once per calendar year, though the exact day count may vary slightly depending on whether a leap year falls within the measurement period.

The term "annual" is widely used in business, finance, health care, and personal planning to describe cycles, reports, checkups, subscriptions, and other activities that repeat every year. An annual salary refers to earnings over 12 months, annual reports cover a one-year business period, and annual physical exams are recommended once per calendar year. For practical purposes, using "annual" as shorthand for 365 days works well for most planning and communication, though precise calculations requiring exact day counts should account for leap years. Understanding that "annual" designates a one-year cycle rather than a fixed day count helps avoid confusion when dates shift slightly from year to year or when calculating periods that span leap years, ensuring accurate planning for long-term commitments and recurring events.