this is so hilarious...when you celebrate your21st burthday, you have finished 21 years on this planet and start your 22nd year. So if this is year one of the century of 'me', in ten years it will be year ten. that year will end and year 11 will begin and so will the next decade: year 11 to year 20. Can you people count and conceptualise a tranche of ten??? Analogy...a cup of 100 mililitres is a century ( 100 ml ok?) you can't stop at 99 ml and call it a century past We are within the year whatever, just like you are within your own socks... amirite?