Perhaps you know it as 4-4-5_Calendar? See the following reference: http://en.wikipedia.org/wiki/4-4-5_Calendar
Reply from Richard Rost:
Ah, yes. This is another perfectly valid method of calculating a fiscal year. It's not as commonly used as a simple fiscal year, but if enough people are interested in seeing this method, I can certainly put something together as an addendum to the seminar. It's a lot more difficult to calculate, but it's certainly doable.
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