The customer service week was created in 1992. It is celebrated every year in the first week of October. Having an official customer service week is a signal that customer service and service design are gaining a certain maturity. It has been celebrated since 1984, but it was officially recognized as a national event by the US Congress in 1992.
Going further
This article is part of the book "A Tiny History of Service Design, " a tiny two-hour read that goes through the historical events that created what Service Design is today.