If you believe the Russian Wikipedia , today is the day of the tester. Happy holiday! More interesting bugs, good tests and understanding programmers!
History reference: A legend is widespread that on September 9, 1945, scientists at Harvard University, who tested the Mark II Aiken Relay Calculator computer, found a moth stuck between the contacts of an electromechanical relay, and Grace Hopper uttered the term.The removed insect was glued in with a scotch tape in a technical diary, with an accompanying inscription: “First actual case of bug being found” (English “the first real case when the bug was found”).It is believed that this funny fact initiated the use of the word "debugging" in the meaning of "debugging the program", however, most likely, the phrase is a pun.