The clock takes into consideration • the number of waking hours in a day, • preferring long blocks of time for working on things, and • standard time being better than daylight time.

This clock is aimed at 15 waking hours in a day spread out over five three-hour periods with the beginning and end each roughly as close to sunrise and sunset respectively as possible and the half-way point being close to solar noon.

•   1% of 3 hours = 108 seconds
•   5% of 3 hours = 9 minutes
• 20% of 3 hours = 36 minutes
• 25% of 3 hours = 45 minutes
• 33% of 3 hours = 1 hour
• 50% of 3 hours = 1.5 hours

Dark Mode

Weather page excerpt with Clear Sky Chart (formerly known as a Clear Sky Clock):

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Currently: 69°F  — — Heavens-Above

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