I've been keeping an eye on this thread for a while now. I finally got given my citizenship ceremony date today!
Here's my timeline:
1. Date applied: 17th September 2016
2. City/Council area: City of Sydney
3. Online / Paper: Online
4. Date of the acknowledgement email: 18th September 2016 (automatic email)
5. Date of the Citizenship Test invite email: 26th September 2016
6. Date of the Citizenship Test: 21st November 2016 (Sydney CBD)
7. Approval letter: 25th November 2016
8. Date of ceremony: 4th April 2017