Photoperiod & Seasonal Rhythms (2D)

🍂 Photoperiodism

Day length is driven by Earth's 23.44° axial tilt: the sun's declination swings seasonally, and combined with your latitude it sets how long the sun stays above the horizon. Many species use day length itself — not temperature — as the cue to trigger migration, hibernation or flowering.

🎛 Parameters

Latitude 51°N Day of year 80 (—) Response threshold 12.0 h

📊 Current stats

Day length

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Declination

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Season

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Response

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