八 is one of the most commonly used Japanese kanji, and it also has a lot of special readings in addition to the standard onyomi and kunyomi readings.
ONYOMI 音読み
や ya や.つ ya.tsu やっ.つ yatsu.tsu よう you
KUNYOMI 訓読み
ハチ hachi ハツ hatsu
Examples
会は八時に解散した。The meeting broke up at eight.朝の八時です。It’s eight o’clock in the morning.夜の八時です。It’s eight o’clock at night.彼女は八歳のときにダンスを始めた。She started dancing when she was eight.明日八時に起こしてください。Please call me at eight tomorrow morning.学校は朝八時から始まります。Our school begins at eight in the morning.私はこの本に八百円を払った。I paid 800 yen for this book.それは八時から十時の間に起こった。It happened between eight and ten.私は十八歳で酒の味を覚えた。I took to drinking when I was eighteen.私たちは一日平均八時間働く。We average 8 hour’s work a day.