After 13 sitting weeks and one lengthy election, we are down to just four more days of Parliament for the year.

Almost 90 bills have been passed in 2016 so far, more than a third of which were adopted after the election.

In case you are having trouble remembering what passed and what has not so far, here is a recap of some of the major developments.

Nick Xenophon wears his pyjamas to the Senate sleepover. ( ABC News: Francis Keany )

Senator Nick Xenophon donned his pyjamas in March, when politicians debated Senate voting reforms for 28 hours straight.

The legislation, which passed 81 votes to 31, made it harder for micro parties to get elected by not allowing them to swap preferences.

The bill was not the only one to pass after a late night session — last week the Registered Organisations bill passed the Upper House at 2:15am.

Governor-General Sir Peter Cosgrove meets Prime Minister Malcolm Turnbull over his double dissolution request. ( Supplied )

Prime Minister Malcolm Turnbull called a double dissolution election in May after two pieces of industrial relations legislation failed to pass the Senate twice.

One bill has since been backed through the Upper House, allowing for the establishment of a registered organisations commission, but negotiations on the Australian Building and Construction Commission legislation are ongoing.

The bill is listed for debate in the Senate this week, which would see the reestablishment of a construction industry watchdog if passed.

The Government's omnibus budget savings bill passed largely intact after negotiations with the opposition. ( ABC News: Marco Catalano )

The Government's omnibus budget savings bill, allowing the Coalition to pocket more than $6 billion in budget savings, passed the Senate in September.

Twenty of the Government's 24 proposed measures were included in the final version of the bill following negotiations with Labor.

Not among them? The baby bonus, with the Government agreeing to axe the one-off $1,000 supplement for new mothers.

Rainbow Families Council protest against the same-sex marriage plebiscite. ( ABC News: Marco Catalano )

One of the year's more talked about bills — legislation that would enable a plebiscite on same-sex marriage — was defeated in November.

The proposal was voted down in the Senate, 33 votes to 29, with Labor and the Greens calling for a free vote in Parliament instead.

Treasurer Scott Morrison and Minister for Revenue and Financial Services Kelly O'Dwyer. ( ABC News: Adam Kennedy )

The Government passed its changes to the superannuation system last week, after months of pressure from both inside and outside the party.

As a result, a $1.6 million cap on the amount of tax-free super savings a person can hold in retirement will be imposed from July 17 and after-tax contributions will be capped at $100,000 a year.

But the measures are different from what was first proposed after Treasurer Scott Morrison dumped several elements of the policy in September.

Crossbench Senator Jacqui Lambie takes aim during the backpacker tax debate. ( ABC News: Adam Kennedy )

The debate around the backpacker tax raged last week with Tasmanian Senator Jacqui Lambie taking part in a fiery back and forth before her amendment to lower the proposed rate to 10.5 per cent passed the Senate.

The amended bill was later rejected by the Lower House and is on the agenda for further debate this week, alongside VET student loans and the Coalition's youth jobs program.

The Coalition are calling for Labor and the crossbench to support its 19 per cent proposal — down from 32.5 per cent — with Finance Minister Mathias Cormann saying the Coalition has compromised "as far as we can sensibly compromise".

Prime Minister Malcolm Turnbull takes a rest in the chamber. ( ABC News: Nick Haggarty )

As we head into the final four sitting days of the year, a lot of legislation remains in limbo.

The Government is yet to deliver on its promised company tax cuts or clarify what its higher education policy is.

Media reforms have been put on the backburner and changes to travel allowances for former politicians are also unlikely to be addressed in the coming days.

The debate over paid parental leave will not be finalised this year — the Government is yet to garner enough support to pass measures which would block new parents from accessing the full 18-week Government scheme if their employer also offers paid leave.

The Government's proposed ban on refugees and asylum seekers on Manus Island and Nauru ever coming to Australia is also yet to be brought back to the chamber.

It is shaping up to be a busy 2017.