Slylandro Timekeeping

The Slylandro Timekeeping system is based entirely on a single natural phenomenon, the rotation period of their homeworld, Source. Since the Slylandro lack any form physical technology, this method of keeping time has persisted throughout the history of their race.

The principle unit of time in this system is the Drahn, equivalent to four million rotations of their home planet. A Drahn is sub-divided into two thousand Drahnasa. For even smaller periods of time, the Slylandro simply use the rotations of their homeworld as a unit of time. The following is an approximate conversion factors between Slylandro and Human units of time:

• 1 rotation = 14.2 earth hours ≈ 0.592 earth days
• 1 Dranhasa ≈ 1180 earth days ≈ 3.24 earth years
• 1 Drahn ≈ 2370000 earth days ≈ 6480 earth years

In discussions with the Slylandro, they consistently make reference to events using these units of time. When converted to conventional units of time, the timing of these events corresponds fairly well with known historical findings. The following table lists these events with the Slylandro time and corresponding Human time:

Slylandro Time	Human Time	Event
a few 100 rotations	a few 59.2 days	time between visits of the Melnorme and The Captain
500 rotations	296 days	mission duration of Slylandro Probes
1 Drahnasa	3.24 years	time within which all The Captain's visits occur
half a Drahn	3240 years	length of time over which the Slylandro had contact with the Sentient Milieu
3 Drahn ago	19400 years	regular visits from the Ur-Quan during the Sentient Milieu era
3-4 Drahn	19400-25900 years	estimated lifespan of a Slylandro
39 Drahn ago	253000 years	last visit from the 'shaggy giants' (the Precursors)
41 Drahn ago	266000 years	first contact from the 'shaggy giants'
many 1000's of Drahn	many 6480000 years	historical extent of Slylandro species

Information about Source's rotation period and historical events was originally presented by SvdB in this [1] forum thread.