Chinese name: 昨天
Pinyin: zuó tiān
English name: yesterday
Characters: The first character 昨 consists of a sun radical 日 and a phonetic component 乍 (pinyin: zhà, original meaning: carving wood with a tool, current meaning: suddenly, just). The character simply means the day that has just passed.
The second character 天 is an ideographic character. Originally in oracle bones, it is a picture of a big person with sky above him. Now the character simply means sky or day.
A literal translation of 昨天 in English is passed day.