"The council-organised displays on Saturday, November 4 will be held at Central Park in Wallasey, Birkenhead Park, Park Drive, Birkehead, Mayer Park in Bebington, Lingham Park in Moreton and Woodchurch Leisure Centre."

(love that the Wirral Globe can't spell "Birkenhead")

SOURCE

Any idea as to why they're being held on 4th November ? Bonfire Night is 5th November and only 5th November. It's illegal to set off fireworks at any other time.

It's a Saturday, no school and fewer people work on Sunday.
The little ones can stay up later.

It’s not on bonfire night so it doesn’t collide with private displays and reduce attendance at both.

It’s not illegal to set fireworks off at other times of the year.

The River of Shite is on on the 5th.

Precisely, you can let off fireworks any time of year between 7am and 11pm. Its only at night there is a definite restriction.