What time is noon 12 in China?

China is earlier than Canada 12 hour.

China, time zone of East Eighth District; Canada, West Zone 5, now implements daylight saving time.

Geographically speaking, the time of each point on the same meridian is the same, but internationally, a time zone is drawn every fifteen longitudes, and the difference between adjacent time zones is one hour. It depends on the central meridian time in that time zone as the national standard time in this country. China takes Dongba District as the standard time zone, but in fact, China spans five time zones, and the time in each place is actually different.

There is no unified conversion method when expanding the time use places in different countries, which brings inconvenience to traffic and communication. Time difference awareness existed before, but it didn't form a perfect system. In order to be unified, the world has adopted the time difference system and followed it, and the time calendars of all countries are based on this system.

Time calculation in different time zones:

Different from the same reduction, the east increases and the west decreases.

"Same" means that the eastern time zone is the same or the western time zone is the same, so the two time zones are subtracted (for example, the East 8th District and the East 5th District are both in the eastern time zone, so 8-5 = 3. ) "Different" is the opposite.

Following a map of the world centered on the zero-time zone, the time zone to the east of the known time zone is the same as the result of adding, subtracting and adding the time of the known time zone. Otherwise reduce.

Baidu encyclopedia-time difference