4-4-5 Calendar
4-4-5 retail calendar
The 4-4-5 calendar divides the fiscal year into 4 quarters, each with two 4-week periods and one 5-week period. Standard in retail and manufacturing for fair period-over-period comparisons.
How the 4-4-5 calendar works
The 4-4-5 calendar divides the fiscal year into 4 quarters, each with 3 periods. The pattern within each quarter is 4 weeks, 4 weeks, 5 weeks — giving 13 weeks per quarter and 52 weeks (364 days) per year. This is commonly used in retail and manufacturing for financial reporting and inventory planning.
The 5-week period typically aligns with a high-sales month, giving retailers a longer window to capture seasonal demand within a single reporting period.
Frequently asked questions
- What is a 4-4-5 calendar?
- A 4-4-5 calendar is a retail accounting calendar that divides the year into 4 quarters, each with two 4-week periods and one 5-week period (13 weeks per quarter, 52 weeks per year). It makes same-period comparisons easy because each period is always the same length.
- Why do retailers use the 4-4-5 calendar?
- Standard calendar months vary from 28 to 31 days, making month-over-month comparisons unreliable. The 4-4-5 calendar fixes this by using consistent week-based periods, so P1 this year covers the same number of days as P1 last year.
- What about the 53rd week?
- Every 5–6 years, a 53rd week falls into the fiscal year. The extra week is typically added to the last period of Q4, making it a 6-week period. This keeps the fiscal year aligned with the calendar.