1. The earliest date for a traditional simultaneous House of Representatives/half-Senate election is Saturday 4 August 2018.
2. The last possible date for a simultaneous election is Saturday 18 May 2019.
3. The future? Lord Byron offers a possible guide:

And for the future — (but I write this reeling,
Having got drunk exceedingly today,
So that I seem to stand upon the ceiling)
I say – the future is a serious matter —
And so — for God’s sake — hock and soda water!

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