Means you can apply for ILR on 28 May 2012
If by personal appearance the decision will be done on the same day.
If you are unable to re-prioritise your April May schedules, then you will have no choice anyway.
It's entirely up to you what you decide to do at the end.
Have you seriously considered the implications of your spouse visa expiring whilst you are in the Philippines?
Have you seriously understood the high probability of proposed changes to settlement visa applications?
If not I strongly suggest you do so as you could be facing a very difficult position regarding UK entry.
Please read here:-
http://filipinaroses.com/showthread....ly-immigration
Just trying to help you understand all the probabilities in your personal prioritisation.