martin luther king jr's birthday

English Thesaurus

1. observed on the Monday closest to January 15 (noun.time)

hypernym	:	legal holiday, national holiday, public holiday,
definition	:	authorized by law and limiting work or official business (noun.time)

part meronym	:	jan, january,
definition	:	the first month of the year; begins 10 days after the winter solstice (noun.time)