A defeat in South Australia's Parliament has not deterred Family First MLC Robert Brokenshire from his quest to shift the state's time zone back by half an hour.

Mr Brokenshire introduced a private member's bill into Parliament, in response to the State Government's failed bid to have the time zone shifted forward to Australian Eastern Standard Time (AEST).

But the bill failed to get the support of either the Government or the Opposition.

Mr Brokenshire said shifting SA's time zone — from Australian Central Standard Time (UTC+09:30) to a new time zone (UTC+09:00) — made a lot of sense.

"No-one in this chamber, no-one anywhere from what I've read, can actually disprove the fact that medical science has said that if you work at high noon, (for your) body clock, natural time zones (are) best for your health," he told Parliament.

"We fought the good fight."

Last year the Government pushed to change the time zone to AEST.

It argued there would be significant benefits through adopting Sydney and Melbourne time, from boosting business opportunities, to removing delays to television programs, and overcoming the perception that SA was "out of touch".

At the same time, it asked if the community would prefer shifting west, to better align with the state's "natural time zone" as well as Asian superpowers Japan and Korea.

In an official survey, community support for the shift west (41 per cent) outpolled the shift east (15 per cent) but staying the same was the preferred option (42 per cent).

Much of the disquiet has come from farmers and residents on the west coast, who complain of sending children to school before the sun rises.

Mr Brokenshire said he remained passionate about the idea.

"I learnt a bit about arithmetic and I'm not going to actually beat the two major parties but we will be back," he said.

"At an appropriate time I will bring this debate back to Parliament."