What?

12.345 ks, 12.345ks, 12.345 kiloseconds, 00.000 ks, 1.105 ks, 1.11 ks, 1.1 ks

• The first two digits measure whole numbers of kiloseconds (although if the leading digit is zero, it can be ommitted)
• The digits following the point express fractions of kiloseconds, general to three decimal places.
• There is an optional space before...
• ks - the symbol for kiloseconds. Note that this should be always in lower case.

Why?

It's a way of getting some of the benefits of measuring time in a metric way, without breaking physics. Most other 'metric' time systems redefine what a second is, and this has huge complications - fancy redefining what a Newton, a Watt and a Tesla are?

Why keep to minutes and hours, when these are perfectly arbitrary measurements of time - it's not even as if they divide the day into nice numbers.

How?

The time in kiloseconds is simply the time since the beginning of the day, expressed in kiloseconds. One kilosecond is (evidently from the S.I. prefix) 1000 seconds, and so the time ranges from 0 ks (midnight) to 86.399 ks (1 second before midnight).

Also of note is that 1 hour is approximately equal to 4 ks (4 ks = 66 minutes) so activities can be split into 1 ks (16 minutes) periods quite easily

For a more concrete answer to how check out the many implementations found below - click on a language to list implementations in that language, and then click on an implementation to see it.

Who?

This is brought to you by all those wonderful people who can be found in #archlinux-offtopic on the freenode irc network.