Yazid bin Mu'awiyah was the son of Amir, who was the companion of our Prophet (sallalaho alihi wasallam). He was born in either 26th or the 27th year of the Hijra. His mother, Maysun, was divorced from Amir but Yazid lived with his father. Yazid was a very clever, witty and intelligent boy.
Yazid had a passion for music and alcohol. He always had a hangover in the morning due to his heavy drinking from the night before. When he hunted, he travelled with many dogs and enjoyed watching animals fighting one another. His fondness of his pets went to such extremes that his pets even travelled on horses laden with gold, and when a pet died, he would mourn for it. Some historians claim that he died due to one of his pets actually biting him while he was playing with it. However, there are many versions as to how he actually died, and Allah ta'ala knows best.
Sayyidina Amir Mu'awiyah could do nothing but reprimand his son for his ways, and offer him advice. He advised him repeatedly, "O my son, why do you indulge yourself in these evil things? Your enemies will triumph at your actions, while your friends will never respect you." As time progressed, so did the habits; all the father could do was to advise him, while the son ignored the advice his father gave.
One day, Yazid asked his father if after his earthly departure, he would be made the King. Yazid promised that he would do nothing but righteous deeds and rule like 'Umar Ibin al-Khatab. Amir was so surprised that he responded by saying, "Sub-han Allah! How can this be possible? I swear by Allah, the Most High, that I have tried my very best to even come near to what 'Umar used to do, and I have not been able to do that!" History proves that Yazid did not in fact implement the Islmaic political, social and economic system like Umar Ibn al- Khattab.
(Tarikh ibn Kathir, Biography of Yazid bin Mu'awiyah)
There is also difference of opinion as to when Yazid died. Abu Bakra bin Ayash says that the people took bay'ah with Yazid in 60 Hijra, and he died in Rabi-ul-Awwal 60 Hijra. But in fact he died on 15th Rabi-ul-Awwal 64 Hijra; and he was 48 years old at that time. Lisanul Mizan Biography Yazid bin Mu'awiya by Hafiz Ibn Hajar Asqalanee