I remember a similar bug in the early 1980s when a line-of-business system went haywire every Wednesday. Every other day it worked fine. We eventually found a

I remember a similar bug in the early 1980s when a line-of-business system went haywire every Wednesday. Every other day it worked fine. We eventually found a maintenance programmer had changed "Wensday" in a database to "Wednesday". Unfortunately this was passed to a C char day[9], so the string had no trailing '\0'. Hilarity ensued.