Passage: Arnoldo Alberto Iguarán Zúñiga (born 18 January 1957), also known as El Guajiro, is a former Colombian footballer who played as a forward. He earned 68 caps for the Colombia national team between 1979 and 1993, playing at the 1990 FIFA World Cup and two Copa América tournaments. With 25 international goals, he was the nation's sole top scorer of all time until Radamel Falcao tied him in 2015.

Question: What day on January was El Guajiro born?
18