The proposals suggest public holidays on St David's Day (1 March), St Patrick’s Day (17 March), St George's Day (23 April) and St Andrew’s Day (30 November).
The UK currently has eight public holidays a year – the fewest of any G20 or EU country.
Speaking on St George’s Day to announce the policy, Mr Corbyn is expected say: "For years, Britain's workers haven't had a proper pay rise, with wages for most people still below 2007 levels.
“After seven years of painful austerity, our workers deserve a break – and under a Labour government, they will have the opportunity of four more days off a year.
“The four nations that make up our great country have rarely been more divided due to the damaging and divisive policies of this Conservative government.”
The Leader of Scottish Labour, Kezia Dugdale is also expected to mention the new propsal: “Scottish Labour believes that together we’re stronger, and that means celebrating what unites us across the four nations of the UK.
“St Andrew’s Day is a proud day of celebration in Scotland, and some workers already get the day off, but Labour would like to see that extended to all workers – not only in Scotland, but across the UK."
The Leader of Welsh Labour, Carwyn Jones will also comment on the policy and will say: “Welsh Labour has long been in favour of making St David's day a public holiday in Wales.
"Today's pledge would make that a reality for the 1.4 million hardworking people across Wales.”
A Conservative source told Sky News: "The British economy would be on permanent holiday if Corbyn got near Downing Street".
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