Calendar computations require taking leap years, varying month lengths (28, 29, 30, or 31 days), and daylight savings changes into account. The Gregorian calendar is the standard calendar layout used across the globe.
A business day calculator determines working days by excluding weekends (Saturdays and Sundays). For project planning and milestones, using working business days rather than calendar days provides accurate project delivery timelines.
A leap year contains 366 days instead of 365, with an extra day added in February. A year is a leap year if it is exactly divisible by 4, except for century years (ending in 00), which must be divisible by 400.