Opposition Leader Tony Abbott has attempted to have parliament censure the prime minister over her "lie" on the carbon tax.
Mr Abbott said the house should censure Julia Gillard for breaching faith with the Australian people by introducing the carbon tax, due to take effect on Sunday.
In a rare act, Ms Gillard has stayed in the chamber to hear what the opposition leader has to say.
"What a red-letter day," Mr Abbott told parliament on Thursday.
"At last, she is prepared to respond and to explain why it is that she so thoroughly misled and lied to the Australian people."