The university has come out publicly stating those who choose to demonstrate at Robertson Park on Friday would not be penalised.

CSU Vice-Chancellor Professor Andrew Vann said the job of an educational institute is to encourage people to think about divisive topics and to take action when appropriate.

"The role of a university is to support debate on important issues," he said.

"Given our commitment to advancing climate change research and debate, we thought it was important to support the strike."

Demonstration organisers in Orange have encouraged employees to walk off the job from 2-4pm to support students, as part of the Schools Strike 4 Climate, Global Climate Strike.

This will be the second recent climate change strike at Robertson Park, following a campus walk off by students from most Orange schools in March.

CSU has asked its staff to work with their supervisors to minimise interruption to student learning.

The university's students who plan to attend have been told to notify their lecturers should it impact their ability to meet work deadlines.

Professor Vann said the strikes provide an opportunity for organisations and businesses to demonstrate they would like to see action.

"We can afford to do this as a society, but change needs to happen before it's too late," he said.

"People can't yet see what the path to a solution is.

"This is an absolutely critical issue for us. What we've seen will be the consequence of global warming in Australia is really troubling."

Professor Vann said he hopes to attend a planned strike from 12-2pm on Russell Street in Bathurst.

Public servants in Victoria have been given the green light to attend rallies on Friday, after an email went out from Victorian premier Daniel Andrews' office.

NSW Premier Gladys Berejiklian has been quiet on the issue this week.

She warned it wasn't appropriate for children to protest during school hours and slammed then Labor leader Michael Daley over his support of pupils striking in March.