Phi Day

Occurrence:
3X
Hashtags:
References:
mathnexus.wwu.edu/archive/humor/detail.asp?ID=212
goldenratio.org/phi_day.html
mathjokes4mathyfolks.wordpress.com/2013/05/17/is-it-phi-day-yet/

This event takes place 3 times annually, on January 6th, on May 19th and on October 31st.