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An event every year that begins at 00:00 on day 8 of July, repeating indefinitely
When: July 8
Where: Everywhere
First occurrence: 2009
Created by Math 2.0 Interest Group in 2009
#Math20Day
An event every year that begins at 00:00 on day 19 of August, repeating indefinitely
An event every year that begins at 00:00 on day 23 of August, repeating indefinitely
An event every year that begins at 00:00 on day 27 of August, repeating indefinitely