noun which may take the genitive case particle 'no'
Used as a no-adjective meaning 'golden' in color, value, or special status. Common in compound terms like ゴールデンウィーク (Golden Week) and ゴールデンタイム (prime time).
ゴールデンウィークに旅行に行く予定です。
I plan to travel during Golden Week.
この番組はゴールデンタイムに放送されます。
This program will be broadcast during prime time.