In case you forgot, it's the same extension period May requested two weeks ago
The key thing in May's letter requesting a Brexit extension is that she lays out two things. The first being that the UK will aim to ratify a deal before 23 May and the second being that if that fails, they will be holding European Parliament elections.
The latter is seen as a key point in the timeline because if the UK does participate in the European elections, then there's really no petty reason why Brexit cannot be delayed to next year. As things stand, May is not really in a position to outright request for an extension to next year as it would be political suicide but the fact that she subtly hints at allowing the European Union to pursue that route means that we're more than likely to end up with a Brexit delay of twelve months - as reported earlier.
All this of course will ultimately depend on the UK finding a solution to break the current Brexit deadlock and as it stands, it doesn't look like we'll get one any time soon.
