England is at (Greenwich Mean Time) GMT. New Zealand is (Greenwich Mean Time) GMT +12 hours, ie. 12 hours ahead of Greenwich, England. England is 12 hours behind New Zealand. (Daylight savings not taken into account.)
CST is UTC-5, this means it is five hours behind GMT/UTC. Therefore, 12 noon in CST is 5pm in GMT.
Ireland is at (Greenwich Mean Time) GMT. New Zealand is (Greenwich Mean Time) GMT +12 hours, ie. 12 hours ahead of Greenwich, England. Ireland is 12 hours behind New Zealand. (Daylight savings not taken into account.)
New Zealand is (Greenwich Mean Time) GMT +12 hours, ie. 12 hours ahead of Greenwich, England. Portland, Oregan is (Greenwich Mean Time) GMT -8 hours, ie. 8 hours behind Greenwich, England. Portland is 20 hours behind New Zealand. (Daylight savings not taken into account.)
Denver is (Greenwich Mean Time) GMT -7 hours, ie. 7 hours behind Greenwich, England. Hong Kong is (Greenwich Mean Time) GMT +8 hours, ie. 8 hours ahead of Greenwich, England. Denver is 15 hours behind Denver. (Daylight savings not taken into account.)
New Zealand's standard time is GMT+12. Italy's is GMT+1. So, disregarding Daylight Savings Time, Italy is eleven hours behind New Zealand.
New Zealand
England is at (Greenwich Mean Time) GMT. New Zealand is (Greenwich Mean Time) GMT +12 hours, ie. 12 hours ahead of Greenwich, England. England is 12 hours behind New Zealand. (Daylight savings not taken into account.)
England (London) is at (Greenwich Mean Time) GMT. US Pacific Time is (Greenwich Mean Time) GMT -8 hours, ie. 8 hours behind Greenwich, England. Los Angeles is 8 hours behind GMT. (Daylight savings not taken into account.)
CST is UTC-5, this means it is five hours behind GMT/UTC. Therefore, 12 noon in CST is 5pm in GMT.
Ireland is at (Greenwich Mean Time) GMT. New Zealand is (Greenwich Mean Time) GMT +12 hours, ie. 12 hours ahead of Greenwich, England. Ireland is 12 hours behind New Zealand. (Daylight savings not taken into account.)
New Zealand is (Greenwich Mean Time) GMT +12 hours, ie. 12 hours ahead of Greenwich, England. Portland, Oregan is (Greenwich Mean Time) GMT -8 hours, ie. 8 hours behind Greenwich, England. Portland is 20 hours behind New Zealand. (Daylight savings not taken into account.)
Denver is (Greenwich Mean Time) GMT -7 hours, ie. 7 hours behind Greenwich, England. Hong Kong is (Greenwich Mean Time) GMT +8 hours, ie. 8 hours ahead of Greenwich, England. Denver is 15 hours behind Denver. (Daylight savings not taken into account.)
The USA has 6 Time Zones including Alaska and Hawaii. Eastern Time - is (Greenwich Mean Time) GMT -5 hours, ie. 5 hours behind Greenwich, England. Central Time - is (Greenwich Mean Time) GMT -6 hours, ie. 6 hours behind Greenwich, England. Mountain Time - is (Greenwich Mean Time) GMT -7 hours, ie. 7 hours behind Greenwich, England. Pacific Time - is (Greenwich Mean Time) GMT -8 hours, ie. 8 hours behind Greenwich, England. Alaska Time - is (Greenwich Mean Time) GMT -9 hours, ie. 9 hours behind Greenwich, England. Hawaii Time - is (Greenwich Mean Time) GMT -10 hours, ie. 10 hours behind Greenwich, England. All of China is in the same time zone, so China is (Greenwich Mean Time) GMT +8 hours, ie. 8 hours ahead of Greenwich, England. Depending on where in the USA you are, the difference is between 13 and 18 hours. (Daylight savings not taken into account.)
Assuming you refer to US time zones - US Central Time - is (Greenwich Mean Time) GMT -6 hours, ie. 6 hours behind Greenwich, England. US Mountain Time - is (Greenwich Mean Time) GMT -7 hours, ie. 7 hours behind Greenwich, England. US Pacific Time - is (Greenwich Mean Time) GMT -8 hours, ie. 8 hours behind Greenwich, England.
13 hours in the future. New York runs -5 GMT. Even though the land mass of China spans five time zones the whole country is officially +8 GMT. If its noon in New York, its 1am in China.
France is (Greenwich Mean Time) GMT +1 hour, ie. 1 hour ahead of Greenwich, England. New Zealand is (Greenwich Mean Time) GMT +12 hours, ie. 12 hours ahead of Greenwich, England. Paris is 11 hours behind Auckland. (Daylight savings not taken into account.)