If you are looking on the Easyjet App, the dates of the month are there, BUT flight dates are always shown in bold type, and if you look closely you will see that none of them are in bold type after 5th May (at the latest). So the daily dates are there but the flight dates are not shown.
I know, I was up at 6am on Tuesday 2nd June to book, then again at 6am yesterday, and then I suppose I will have to get up early again on 10th June.