Created Standard Galactic Time Unit (markdown)

Larana/Standard Galactic Time Unit.md

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+The **Standard Galactic Time Unit** or SGTU is the time unit used for standard communication of time across the many planets and polities of the [[Galactic Cooperation Treaty Organisation|Larana/Galactic Cooperation Treaty Organisation]].
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+It is defined as followed:
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+SGTU quantities are oft expressed either in binary (for the computers), or hexadecimal (for the normal folks)
+1 SGTU is the length \\(2^{32}\\) periods of the wavelength emited by the [[Ly-α|https://en.wikipedia.org/wiki/Lyman-alpha]] transition of the Hydrogen atom. This amounts to about 1.74µs
+
+SGTU Timestamps are expressed as a the number of SGTU elapsed since the founding of the GCTO.
+when written they are typically written in groups of 4 hex digits followed by another delimiter and the number of groups the precison omits, the last group may also contain less than 4 digits in which case the lowest significan digits are assumed to be ommitted. e.g. `123F.12/1` is assumed to be equivalent to `123F.12XX.XXXX` (where X is not specified). the start of the timestamp may also be omitted when redundant, in practice it is rare that more than 2 or 3 groups are ever written, unless the activity requires full precision and/or unambiguity.
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+example:
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+30 September 2065, 13:12 UTC+2 would be oft renderd as `3D13.65/1` or `18F.3D13.6556.6AD9` for full specificity

Larana/Timekeeping.md

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+Keeping track of time in a meaningful way when your polity controls a dozen worlds and has trade relations with at least 5 dozen more is hard. Thus was invented the [[Standard Galactic Time Unit|Larana/Standard Galactic Time Unit]]. With that system, interplanetary (and interstellar) activities have a common neutral time system to synchronise things such has [[FtL communication|Larana/Faster than Light Communication]], while planet-side affairs typically use a mix of the expressing an absolute unit in the largest SGTU subunit that’ll fit in a local day, to which is added a SGTU duration after the local normalised sunrise.
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+For example Earth’s 30 September 2065, 13:12 UTC would be `3D13.65/1` (or `18F.3D13.6556.6AD9` for full specificity) in interstelar communication, but would be refered to as something like `3D13.6/1L+1b1af/1` "on the day that starts on `3D13.6/1` according to the `L`ocal standardised day, at `1b1af/1` past local standardised midnight.
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+Note however that, as of 2376, Earth, despite being a signatory of the GTCO still seldom use SGTUs in planetary affairs, oft chosing to use it’s legacy base 60 time system