<human>:  Does 2015 have more unlucky Friday's than usual?
<bot>: Yes, 2015 has more unlucky Friday's than usual. Friday the 13th is known as an unlucky Friday because of the number 13 and a year can have as many as three Friday the 13ths and one Friday the 13th is the average per year, so there were 3 Friday the 13ths in 2015.