Standard Time = GMT+10
Daylight Saving = GMT+11
Standard Time is 10 hours ahead of Greenwich Mean Time (GMT+10).
Exception: YancOwinna (also known as Broken Hill) is in NSW, but adheres to South Australian time, including Daylight Saving Time.
Daylight Saving Time is observed in New South Wales, where the time is shifted forward by 1 hour, resulting in a 11 hour difference ahead of Greenwich Mean Time (GMT+11).
After the Summer months the time is shifted back by 1 hour resulting in the normal Standard Time.
Standard time in New South Wales (known as Eastern Standard Time) is the mean time of the meridian of longitude 150 degrees east of Greenwich, England. In other words, New South Wales (except for Broken Hill and Lord Howe Island) is 10 hours ahead of Greenwich.
Standard time in Broken Hill (i.e. the County of Yancowinna) is the mean time of the meridian of longitude 142 degrees 30 minutes east of Greenwich and standard time in Lord Howe Island is the mean time of the meridian of longitude 157 degrees 30 minutes east of Greenwich (9.5 hours and 10.5 hours ahead of Greenwich respectively).
Australia Daylight Saving Time begins at 2am (AEST) on the first Sunday in October and ends at 2am (AEST) (which is 3am Australian Eastern Daylight Time) on the first Sunday in April.
The international dialling code for New South Wales is +612.
Government of New South Wales website : www.nsw.gov.au