On 1 January 1660 Pepys began to keep a diary. He recorded his daily life for almost ten years. This record of a decade of Pepys's life is more than a million words long and is often regarded as Britain's most celebrated diary. Pepys has been called the greatest diarist of all time due to his frankness in writing concerning his own weaknesses and the accuracy with which he records events of daily British life and major events in the 17th century. Pepys wrote about the contemporary court and theatre (including his amorous affairs with the actresses), his household, and major political and social occurrences. Historians have been using his diary to gain greater insight and understanding of life in London in the 17th century. Pepys wrote consistently on subjects such as personal finances, the time he got up in the morning, the weather, and what he ate. He wrote at length about his new watch which he was very proud of (and which had an alarm, a new accessory at the time), a country visitor who did not enjoy his time in London because he felt that it was too crowded, and his cat waking him up at one in the morning. Pepys's diary is one of a very few sources which provides such length in details of everyday life of an upper-middle-class man during the seventeenth century.