[LEAPSECS] Leap smear

[Poul-Henning Kamp]

In message <AD679E84-72AE-4F73-8366-404F9CFCBE38 at bsdimp.com>, Warner Losh write
s:


>Both are approximations of the "well, you should only hunt when

>it is light enough" and nobody carries around tables of times and

>everybody generally agrees when it is dusk or dawn. 


In Denmark we actually have a several centuries old legal definition
of dusk and dawn, promulgated by none other than Astronomer Ole Römer:

	Civil twilight:  Sun less than 6 degrees under the horizon
	Nautical twilight:  Sun less than 12 degrees under the horizon
	Astronomical twilight:  Sun less than 18 degrees under the horizon

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