The seasonal changes have been a source of inspiration for poets and poetry.

Malcolm Turnbull was also struck with such inspiration this morning when he noticed dramatic foliage in the courtyard.

“Parliament has resumed and the trees in the courtyard have changed colour in time for the budget ‪#‎budgettrees‬,” Mr Turnbull posted on Facebook and Twitter this morning.

Scarlet-coloured trees prompted ridicule as social media users commented what the spectacular shade of red means in tomorrow night’s budget which Mr Turnbull said earlier would include “substantial” changes to the tax system.

A picture is worth a thousand words:

Parliament has resumed and the trees in the courtyard have changed colour in time for the budget #budgettrees pic.twitter.com/fQ7UCeQmBc — Malcolm Turnbull (@TurnbullMalcolm) May 1, 2016

@TurnbullMalcolm very significant. The budget extremely deep in the red. — steve hearne (@stevehearne7) May 1, 2016

Earlier Treasurer Scott Morrison has confirmed wealthier Australians will pay more tax on their superannuation, but that there will be some relief for those pushed into higher income tax brackets by inflation.

“We’re not fiddling, this is going to be a critically important economic document,” Mr Turnbull told Sky News.

“There is substantial tax reform, or tax changes, in the budget.”

The Prime Minister has also sought to make a clean break from the Coalition’s deeply unpopular 2014 budget, saying Mr Morrison would be presenting “more than a usual budget” and “a new agenda” to take to the election.

“This is not Tony Abbott’s plan, this is the plan of the Turnbull Government,” Mr Turnbull said.

“It is a plan to ensure jobs and growth and a sustainable tax system, and the restoration of the budget to balance, bringing those deficits down in a managed and measured way so that we … live within our means.”