In the United States, the T-bone has the meat-cutting classification IMPS 1174; the porterhouse is IMPS 1173. In British usage, followed in Commonwealth countries, porterhouse refers to the strip steak side of a T-bone steak, while the tenderloin side is called the fillet.
In set theory, an ordinal number, or ordinal, is one generalization of the concept of a natural number that is used to describe a way to arrange a collection of objects in order, one after another. Any finite collection of objects can be put in order just by the process of counting: labeling the objects with distinct whole numbers.
Given these two numbers, year_ordinal (the ordinal position of day within the year) and week_ordinal(1/1) (the ordinal position of January 1 within the week), the week_ordinal for any date is easily found by the formula.