Residents across NSW, South Australia, Tasmania, Victoria and the ACT are going to be lacking an hour of sleep with daylight saving beginning this Sunday.
At 2am on Sunday October 3, clocks jump forward an hour to 3am, turning that lost hour of night time into an extra hour of daylight across the summer evenings.
You shouldn't have to worry about re-setting your mobile phone though, it should update automatically (as should your TV, computer and any other device connected to the internet).
IN OTHER NEWS:
The clocks in the car and on the wall though - you'll have to remember to wind them forward.
Those living in Queensland, Western Australia and the Northern Territory don't have to do anything as they don't observe daylight saving.
Daylight saving will finish on Sunday, April 3.