SECTIONS
A 4,4,5 calendar is divided into four quarters. Each quarter has 13 weeks, which are grouped into two 4-week periods and one 5-week period.
An example 4,4,5 recognition calendar may look like this:
Start Date: January 3, 2010
Period Calculation Basis: 445
Number of Weeks: 52
End Date: January 1, 2011
| Period | Weeks | Days | Start Date | End Date | Quarter |
|---|---|---|---|---|---|
| 001 | 4 | 28 | January 3, 2010 | January 30, 2010 | Q1 |
| 002 | 4 | 28 | January 31, 2010 | February 27, 2010 | |
| 003 | 5 | 35 | February 28, 2010 | April 3, 2010 | |
| 004 | 4 | 28 | April 4, 2010 | May 1, 2010 | Q2 |
| 005 | 4 | 28 | May 2, 2010 | May 29, 2010 | |
| 006 | 5 | 35 | May 30, 2010 | July 3, 2010 | |
| 007 | 4 | 28 | July 4, 2010 | July 31, 2010 | Q3 |
| 008 | 4 | 28 | August 1, 2010 | August 28, 2010 | |
| 009 | 5 | 35 | August 29, 2010 | October 2, 2010 | |
| 010 | 4 | 28 | October 3, 2010 | October 30, 2010 | Q4 |
| 011 | 4 | 28 | October 31, 2010 | November 27, 2010 | |
| 012 | 5 | 35 | November 28, 2010 | January 1, 2011 |
The next 52-week year would start January 2, 2011 and end on December 31, 2011 and so on.
Alternatively, but less commonly, you can set the groupings up as 5,4,4 or 4,5,4 weeks as your business requires.
53 Week Years
The main advantage of a 4,4,5 calendar is that the end date of a period is always the same day of the week. However, one disadvantage is that it has 364 days (7 days x 52 weeks). This means that approximately every five years there will be a 53 week year to take account of this and leap years.
The extra week in a 53-week year is added to the last period of Q4. In the earlier example, Period 12 would last six weeks.