ThereMetric havetime beenproperly proposalsrefers whichto havemeasurement been erroneously called "metricof time"which areinterval, actually some form ofwhile [[decimal time]] ofrefers day, in whichto the [[meantime solarof day]] is divided by powers of ten. The modernized metric system defines units for the measure of time interval, but notStandard time of day, which is defined by various time scales, such as [[UTC]], thatwhich are now usually based upon the SImetric base unit of time, the second. Some proposals for alternative units of metric time are accompanied by proposeddecimal time scales for telling the time of day based upon these alternative units. Other proposals called "metric time" refer only to decimal time, and therefore are not truly metric.
[[France|French]] decimal time is sometimes called "metric time" because it was introduced around the same time as the metric system and both were decimal, but it was not part of the decree creating the original metric system and its units were named for the [[hour]], [[minute]] and [[second]], instead of using metric prefixes. Other decimal time standards, such as [[Swatch Internet Time]], are not considered metric time.
