Rule:  Only wear white between Memorial Day and Labor Day. 

Origin: The rule was created for the nouveau-riche (late 19th century) who were unaware of the standards of high society. Originally referring to white shoes, the rule was created in order for the nouveau riche to fit it. According to Hoyle, rules are sometimes meant to be broken.  

Fact Credit: ask.com

White Tie: The term used to designate formal dress. White tie is one step above black tie on the formality scale. A white vest, bow tie, and shirt are worn with a black tux to such occasions. 

White-On-White: White fabric with a raised white pattern.

Fact Credit: Dressing The Man, Alan Flusser, p. 304; about.com 

                                                                                                                 Photo Credit: men.style.com