It would keep changing. For example, you would become 28 on 6th May 2012,
but remain 30 for only 1 year before your oldness changed again.
In my year it is 2009 so you would be 15. =) The way i figured it out is that 1984 + until you get to 2009
Monica May was born in 1984.
May Mansour was born in 1984.
Carmelo Anthony was born on May 29, 1984
Nate Robinson was born on May 31, 1984
Andres Iniesta was born on May 11, 1984
Ben May was born on March 10, 1984.
Rory May was born on 1984-11-25.
Sean May was born on 1984-04-04.
Stacy May-Johnson was born in 1984.
May 31st, 1984.
Will Pugh was born on May 4, 1984.