Billing Period

May 18, 2018

I’m not sure of the origin of today’s exercise, but given the contrived nature of the calculation, I suspect it’s a programming exercise for beginning programming students:

Our merchants receive “weekly” invoices, following these rules:

  • Each Saturday marks the beginning of a new billing period.
  • Each 1st of a month marks the begining of a new billing period.
  • Within a year, billing periods are numbered consecutively, starting with billing period 1 on January 1st.

Thus, a billing period can be referenced by a year and period number.

Your task is to write a program that calculates the billing period for a given date. When you are finished, you are welcome to read or run a suggested solution, or to post your own solution or discuss the exercise in the comments below.

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