Reply I have just received from EFL regarding date etc.
Plans for the final day of the season are yet to be confirmed. We await further guidance from the DCMS and discussions will need to take place with all relevant stakeholders, including broadcasters.
We will of course endeavour to confirm final day fixture dates as soon as reasonably possible, in order to allow supporters to make necessary plans.
I had to look up up who DCMS are and it's the Department for Digital, Culture, Media & Sport ( I think! )