"When I knew they liked me, I just said to them, 'I'm really good and productive, would you be open to me working four days a week instead of five?' And he just said, 'Yes'," she said.

She wasn't 100 per cent committed to the role and wouldn't have minded if they knocked her back, so she wanted to see what she could negotiate.

If times were harder and she either needed a job or really liked the role, she said wouldn't have chanced it. Because it worked once and had the evidence to show she could handle it, she did it two more times.

Kotsoris said the move has been a massive game-changer for her.

"A lot of people struggle with not having purpose and feeling miserable because of that," she said. "You'd be surprised at the happiness, joy and energy you have by working four days a week."

If you don't ask, you don't get - but there's a fine line with that

Kotsoris proved that if you don't pose the question then you'll never get an answer.

However, Indeed's career coach Sally McKibbin explained to Yahoo Finance that you can't boldly ask for a work perk like a four-day week if you have nothing to back it up.

"I think the internet and social media might give us some unrealistic ideas or thoughts about what actually happens in the workforce," she said.

"They're seeing influencers or other people doing things or seeking out things. And a lot of those things need to be earned, or you work your way up to."

McKibbin said you can propose a shorter week on the same pay to your boss, but you have to go about it the right way and you might not be able to keep the same pay.

"As long as they're not expecting the full annual salary, I think it's pretty reasonable to ask whether that is suitable for that particular role is going to be determined by the organisation's needs," she said.

Pushing the envelope is changing Australia's workplace landscape

McKibbin said it would be unheard of to have suggested a four-day work week a few decades ago, but she said the Australian, and global, workplace norms are slowly being adjusted.

Obviously the biggest shift in work culture came four years ago when everyone had to work from home, but there are other changes happening all around us.

And those Gen Z and millennial workers are partly to thank (or blame - depending on how you view it).

"Younger people are bold enough to ask," she told Yahoo Finance.

"I was told in one of my first corporate jobs that I needed to tone down my personality... I can't imagine that flying these days, no matter the age group.

"We're already seeing organisations testing out things like the four-day working week... the Right to Disconnect that has been imparted this year... those types of things are already changing the way that we're working.

"And I think we'll see more, more changes to come."

Get the latest Yahoo Finance news - follow us on Facebook, LinkedIn and Instagram.