Apple is planning something to mark the tenth anniversary of his first start

Employees of different Apple stores in the U.S. have received an email from the company asking them not catch a day off between days 20 and 22 May. Normally, Apple sends such emails to its employees when the company plans to do a big launch to the market (like the iPhone or IPAD).

However, this time those dates coincide with the tenth anniversary of the opening of the company's first stores in the U.S., which indicates that Apple prepares some sort of special event for those days. Do you gamble?