In 1883, the United States and Canada adopted a system of Standard Time zones.
In 1883, the United States and Canada adopted a system of Standard Time zones.
1883年，美国和加拿大采用了标准时间系统。
In 1883, the United States and Canada adopted a system of Standard Time zones.
1883年，美国和加拿大采用了标准时间系统。