Via river.

• 4th Monday of January : Community manager appreciation day
• January 28th : Data privacy day *Second Monday in February : Clean out your computer day
• March 21 : Education Freedom day
• March 31st : World backup Day
• Last Wednesday of March : Document Freedom Day
• First Thursday in May : [World Password day]
• Third Saturday of May : Culture Freedom Day
• Last Friday in July : Sysadmin Day / Sysmas
• August 16 : Debian Day
• Third Saturday of September : Software freedom day
• October 5 : World Teacher's Day - a special day to remind all teachers but also your Comp. Sci. or engineering teachers how much you appreciate them :)
• October 1st : International Coffee Day
• October 29 : Internet Day
• November 8 : World day without wifi