Create a Vacuum Day
Create a Vacuum Day is held on February 4. This event in the first decade of the month February is annual. 
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Vacuum is space devoid of matter.
The word stems from the Latin adjective vacuus for "vacant" or "void".
An approximation to such vacuum is a region with a gaseous pressure much less than atmospheric pressure.
Similar holidays and events, festivals and interesting facts
Dump Your Significant Jerk Day on February 3
The Day the Music Died on February 3 (On February 3, 1959, American rock and roll musicians Buddy Holly, Ritchie Valens, and "The Big Bopper" J. P. Richardson were killed in a plane crash near Clear Lake, Iowa, together with pilot Roger Peterson);
International Day Against Swearing on February 3
Thank a Mailman Day or Mail Carrier Day in USA on February 4
The Fools' Court in Stockach on February 4 (political spectacle for 660 years);
Working Naked Day on February 5 (is founded by Lisa Kanarek);
Western Monarch Day on February 5
National Wear Red Day in United States on February 5 (celebrated on the first Friday in February)