Reference from: https://www.timeanddate.com/astronomy/australiasydney/June Solstice (Winter Solstice) is on Wednesday, 21 June 2017 at 2:24 pm in Sydney. In terms of daylight, this day is 4 hours, 31 minutes shorter than on December Solstice. In locations south of Equator, the shortest day of the year is around this date.
Kevin