Yes, but it's more accurate to say UTC+8.
gkvnc
GMT - Greenwich Mean Time
It should be ahead...Singapore is in the +8 GMT timezone whereas according to your question, Ireland is in the +1 GMT timezone.
The EST timezone is GMT-5 meaning EST is five hours behind GMT.
The time difference between US Eastern Standard Time and Hong Kong Time (also the Beijing time) is exactly 12 hours - very easy to calculate! If it is 9.00 22/09/08 in the US it is 21.00 22/09/08 in HK. i.e. Hong Kong is faster than the US by 12 hours.
The easiest way to answer that question is to say that Hong Kong time is calculated as GMT plus 8 hours. In other words, if GMT is 1500 (3 PM), Hong Kong would be 8 hours later, or 2300 (11 PM). Now, all you need to know is what GMT is and you can figure out the time anywhere in the world.
5 pm GMT = 1 am HKT
Chile's continental timezone is UTC/GMT -4 Easter Island timezone is UTC/GMT -6
HKT 9.00 Hong Kong Time is the time 8 hours in advance of Greenwich Mean Time.
Pottermore is British. It is in the GMT timezone.
There is no time difference (both are GMT +08:00)
GMT +4 hours
GMT (+ 1 in summer)
gkvnc
France is (Greenwich Mean Time) GMT +1 hours, ie. 1 hours ahead of Greenwich, England. Hong Kong is (Greenwich Mean Time) GMT +8 hours, ie. 8 hours ahead of Greenwich, England. Paris is 7 hours behind Hong Kong. (Daylight savings not taken into account.)
Thailand timezone is GMT+7
They follow GMT +1