| Time |
| This page look easy? Guess again. Hour: 60 Minutes Minute: 60 Seconds Second: The duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium 133 atom. |
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Mathematics ---------------- |
| Period Number Biennial 2 Years Triennial 3 Years Quadrennial 4 Years Quinquennial 5 Years Sexennial 6 Years Septennial 7 Years Octennial 8 Years Novennial 9 Years Decennial 10 Years Undecennial 11 Years Duodecennial 12 Years Quindecennial 15 Years Vicennial 20 Years Tricennial 30 Years Semicentennial 50 Years Centennial 100 Years Sesquicentennial 150 Years Bicentennial 200 Years Quadricentennial 400 Years Quincentennial 500 Years Millenial 1000 Years *Under construction* |