The Third Age
The name of this Singapore-based organization, Council for Third Age, has always struck me as somewhat illiterate: it cries out for a definite article, the, before the ordinal third.
Compare this with the UK-based University of the Third Age:
Why Second Life and not The Second Life, then? Probably because it is considered to be a proper name, making the definite article redundant or wrong — for the same reason that we wouldn’t normally say *The George is coming. We could, however, say You are not the George I used to know, but this would be a special case of treating George as a common noun rather than a proper noun.