It is called Centenary.
1 with a hundred zero is called a gogle
one hundred quadrilion
One hundred-millionth of a centimetre is one millionth of a meter called a micrometer and written with the Greek *mju* character: µ
One centomillenium.
One hundred million
Centennial
A one-hundred-year-old person can be called a Centenarian.
Chinese New Year
The numeral is "one thousand, one hundred" and the year is "eleven hundred."
after 1 year a hundred dollars was worth one hundred and fifty dollars.
1 with a hundred zero is called a gogle
Everybody celebrates in different ways. There is no one answer to this question.
US
The one in new York is the best
One rings in the new year through celebration. However one celebrates, be it partying or staying home or resolutions; one rings in the new year in this way.
Two hundred years could be called: - two centuries - twenty decades - two-hundred years
It is written: Nineteen hundred or one thousand nine hundred.