So there is this. 
This is a bit of a confusing schedule to follow I think, at least for the first little while. It would be handy to be able to put it into, say, a Google Calendar so one could work out where and when you would be.
Unfortunately in Google Calendar you can't say "This event should repeat every X hours" – it only copes with repeating in days, weeks, etc.
So the obvious solution is to do six seperate "sleep" events which each one repeating once a week. Great so far?
The problem with the six separate events is that you might want to have an adjustment in between – so you might occasionally want to get up an hour earlier or go to bed a couple of hour earlier – in such situations you'd like to adjust only next sleep time and have everything else adjust by the right amount automatically.
Any ideas?
Best Answer
So in the absence of other answers - my workaround has been to take advantage of Gcal's ability to import events from an excel file - I set some stuff up in Excel (where it's fairly easy to have events advance by a couple of hours) and then update when I need to - it's not an ideal strategy (It lacks a certain WYSIWYG) but I've no better ideas.