Calendar Wiki

For accounting, Apple’s fiscal calendar uses a week-based year with custom months and quarters. This schedule is also used to pay out royalties from iTunes and App Store sales, for instance, so affects people outside the company.

  • Weeks start on Sunday and end on Saturday, as is common in the US.
  • The year is divided into four quarters.
  • The first quarter, Q1, starts at the last Sunday of September.
  • Each quarter is divided into three months.
  • Each month has a whole number of weeks: five weeks in the first, four weeks in the other two (5:4:4).
  • Therefore, each quarter has exactly 13 weeks.
  • At the end of the calendar year, i.e. at the end of the first fiscal quarter, an extra week is added every five to six years.
  • This makes the quarter that contains Christmas longer (14 weeks) sometimes, which complicates year-to-year and quarter-to-quarter comparisons.

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