Henge pages · New York
Flatiron Building: henge days
24 henge days a year on 2 walls. Next: sunrise square to the E wall, Mar 8, 2027 to Mar 10, 2027, best Mon, Mar 8, 2027 at 06:21.
Triangular plan between Fifth Avenue and Broadway. Three facades, three very different head-on times.
Open it in Henge DaysComputed on Oct 13, 2026 for the 12 months to Oct 13, 2027, from the OpenStreetMap outline (way/264768896). Times are local to New York (America/New_York).
WNW wall faces 299°, 49 m
Days of head-on light under 15°: 18 henge, 34 golden.
| Light | When | Dates | Days | Best day | Time | Sun |
|---|---|---|---|---|---|---|
| Henge | Sunset | May 26, 2027 to Jun 3, 2027 | 9 | Wed, May 26, 2027 | 20:14 | 0° |
| Golden | Sunset | May 26, 2027 to Jul 16, 2027 | 52 | Wed, May 26, 2027 | 20:14 | 0° |
| Low sun | Sunset | May 26, 2027 to Jul 16, 2027 | 52 | Wed, May 26, 2027 | 20:14 | 0° |
| Henge | Sunset | Jul 8, 2027 to Jul 16, 2027 | 9 | Fri, Jul 16, 2027 | 20:23 | 0.1° |
E wall faces 96°, 55 m
Days of head-on light under 15°: 6 henge, 16 golden, 30 low sun.
| Light | When | Dates | Days | Best day | Time | Sun |
|---|---|---|---|---|---|---|
| Henge | Sunrise | Mar 8, 2027 to Mar 10, 2027 | 3 | Mon, Mar 8, 2027 | 06:21 | 0.1° |
| Golden | Sunrise | Mar 8, 2027 to Mar 18, 2027 | 11 | Mon, Mar 8, 2027 | 06:21 | 0.1° |
| Low sun | Sunrise | Mar 8, 2027 to Apr 2, 2027 | 26 | Mon, Mar 8, 2027 | 06:21 | 0.1° |
| Low sun | Sunrise | Sep 10, 2027 to Oct 5, 2027 | 26 | Tue, Oct 5, 2027 | 06:59 | 0.3° |
| Golden | Sunrise | Sep 25, 2027 to Oct 5, 2027 | 11 | Tue, Oct 5, 2027 | 06:59 | 0.3° |
| Henge | Sunrise | Oct 3, 2027 to Oct 5, 2027 | 3 | Tue, Oct 5, 2027 | 06:59 | 0.3° |
SSW wall faces 209°, 23 m
The sun never strikes this wall head-on under 15°; it gets only high sun.
About these dates
A henge day has the sun on the horizon, under 1.5° up, square to the wall. Golden is under 6°, low sun under 15°. A window of several days has a best day, when the sun is lowest, and that day's time. Every date and time here is computed from the building outline in OpenStreetMap and the position of the sun, never checked on the ground. An outline a degree off moves the head-on minute by about four minutes. Hills, trees and other buildings can block a low sun. Treat each date as a plan to confirm before you travel. See Terms and accuracy.