Schools across Leicester and Leicestershire could be forced to shut next month when teaching staff strike.
Two major unions announced the action yesterday as part of a joint campaign against pension changes and working arrangements.
A mass rally is being planned by the NUT and NASUWT on the day – October 1 – although details of where this will take place have yet to be released.
Ian Leaver, spokesman for Leicester's branch of the NUT, said: "Following the continued refusal of the Secretary of State, Michael Gove, to genuinely engage with us to resolve our trade disputes with him, plans are in place for the next stage of industrial action.
"Teachers will attend a series of regional rallies to demonstrate their anger, frustration and concern. Plans are also in place for a one-day, all-out national strike before the end of the autumn term."
It will be up to individual headteachers to decide whether a school can remain open.
However, union leaders hope that the early notification will give parents time to find alternative childcare on the day.
A spokesman for the Department for Education said: "It's disappointing they are striking over the Government's measures to allow heads to pay good teachers more.
"In a recent poll, 61 per cent of respondents supported linking teachers' pay to performance and 70 per cent either opposed strikes or believed that teachers should not be allowed to strike at all."
