Classic · Cities
Chicagohenge 2027: dates and times
Chicago, the Loop’s east–west streets
Next date UTC−5
What happens
The axis runs at 270° from north: the setting sun falls into it while its height is between 0.0° and 2.5°. Outside that band the alignment does not close.
Next dates
Local times at the site (America/Chicago).
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18:56 UTC−5
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18:41 UTC−5
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18:56 UTC−5
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18:41 UTC−5
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18:57 UTC−5
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18:42 UTC−5
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18:55 UTC−5
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18:42 UTC−5
Where to stand
Viewpoint: Madison & Michigan · Chicago, the Loop’s east–west streets
41.88200, -87.62460
Look towards 270° from north.
Good to know
Any east–west street downtown; Madison, Monroe and Jackson are the most open. The sun drops between the elevated L tracks.
The peak date depends on how high you want the sun in the street: the disc on the horizon falls a few days before or after the “ball” 2° up. For about a week the effect looks much the same.
Dates for 2026–2030, worked out by Duskbox’s own astronomy engine: the sun from NREL’s SPA, the moon topocentric, both with atmospheric refraction.
