Premodifier: first
Head noun: day
Postmodifier: of summer

Same concepts
http://dbpedia.org/resource/First_Day_of_Summer

Broader concepts

labelprovenanceconfidence
dayisap:2807315500.616470
day of the yearisap:2807313430.609942

Narrower concepts

labelprovenanceconfidence
todayisap:3235341110.475850