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| | Decimal Time - Metric Time |
 | | Metric multiples include the kilosecond and megasecond, but for everyday use, non-metric minutes, hours, and days are used, instead, and larger units such as weeks, months, and years. |
 | | Since the mean solar day and tropical year both vary slightly, the SI second was defined more precisely in 1967 as 9,192,631,770 cycles of the vibration of the cesium 133 atom. |
 | | For this reason, critics claim that truly metric time does not exist, and since the second is not a decimal fraction of the day, it also cannot be used as the basis of a decimal time of day. |
| www.decimaltime.hynes.net /metric.html (1960 words) |
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