1 E8 s Information & 1 E8 s Links at HealthHaven.com

To help compare orders of magnitude of different times this page lists times between 3.2 years and 32 years (10⁸ seconds and 10⁹ seconds). See also times of other orders of magnitude.

Shorter times
4 years—full term of the President of the United States; (roughly) an Olympiad.
4.37 years—the length of time for light from Alpha Centauri to reach Earth
4.6 years—orbital period of Ceres
5 years—maximum length of a term in the British Parliament
6 years—full term of a Senator in the United States
7 years—the interval between leap seconds on December 31, 1998 and December 31, 2005, the longest one as of 2009^[update]
10 years—one decade = 3.16 × 10⁸ seconds
11 years -- sunspot activity cycle (7.5 to 11 years)
11.87 years—one orbit of Jupiter
12 years—length of one cycle through the Chinese zodiac (Terrestrial branch)
12.27 years—duration of Nazi Germany
13 years—typical time to complete K-12 education in the United States.
15 years—age at which one is first eligible to receive a driver's license in New Zealand.
16 years—usual age at which one is first eligible to receive a driver's license in most States of the United States.
18 years/567.9936 megaseconds/567,993,600 seconds—age at which (in the United States) one is legally permitted to vote, sign contracts, and to use tobacco products.
18.03 years -- Saros cycle, the period of solar eclipses and lunar eclipses
19.0002 years—235 months (1 Metonic cycle)
19.713 years (7200 days) -- one katun in the Mesoamerican Long Count calendar
21 years—age at which one can consumer alcoholic beverages in the United States.
29 years—recorded maximum lifespan of a dog
29.458 years—one orbit of Saturn

[edit] Half lives