# Tate Modern, London: henge days

> 37 henge days a year on 4 walls. Next: sunrise square to the ESE wall, Nov 13, 2026 to Nov 18, 2026, best Wed, Nov 18, 2026 at 07:26.

Long brick river facade facing north across the Thames: head-on sun only around midsummer sunrise and sunset.

Computed on Oct 13, 2026 for the 12 months to Oct 13, 2027, from the OpenStreetMap outline (way/24642569). Times are local to London (Europe/London). Open it in the app: https://hengedays.com/?example=tate-modern. Machine-readable: https://hengedays.com/henge/tate-modern-london.json.

## ESE wall (faces 121°, 46 m)

| Light | When | Dates | Days | Best day | Time | Sun height |
|---|---|---|---:|---|---:|---:|
| Low sun | Sunrise | Oct 13, 2026 to Nov 18, 2026 | 37 | Wed, Nov 18, 2026 | 07:26 | 0.1° |
| Golden | Sunrise | Oct 31, 2026 to Nov 18, 2026 | 19 | Wed, Nov 18, 2026 | 07:26 | 0.1° |
| Henge | Sunrise | Nov 13, 2026 to Nov 18, 2026 | 6 | Wed, Nov 18, 2026 | 07:26 | 0.1° |
| Henge | Sunrise | Jan 24, 2027 to Jan 29, 2027 | 6 | Sun, Jan 24, 2027 | 07:53 | 0.1° |
| Golden | Sunrise | Jan 24, 2027 to Feb 11, 2027 | 19 | Sun, Jan 24, 2027 | 07:53 | 0.1° |
| Low sun | Sunrise | Jan 24, 2027 to Mar 4, 2027 | 40 | Sun, Jan 24, 2027 | 07:53 | 0.1° |
| Low sun | Sunrise | Oct 10, 2027 to Oct 13, 2027 | 4 | Wed, Oct 13, 2027 | 08:58 | 13.4° |

## WNW wall (faces 285°, 41 m)

| Light | When | Dates | Days | Best day | Time | Sun height |
|---|---|---|---:|---|---:|---:|
| Henge | Sunset | Apr 12, 2027 to Apr 15, 2027 | 4 | Mon, Apr 12, 2027 | 19:48 | 0.2° |
| Golden | Sunset | Apr 12, 2027 to Apr 26, 2027 | 15 | Mon, Apr 12, 2027 | 19:48 | 0.2° |
| Low sun | Sunset | Apr 12, 2027 to May 23, 2027 | 42 | Mon, Apr 12, 2027 | 19:48 | 0.2° |
| Low sun | Sunset | Jul 19, 2027 to Aug 31, 2027 | 44 | Tue, Aug 31, 2027 | 19:48 | 0° |
| Golden | Sunset | Aug 16, 2027 to Aug 31, 2027 | 16 | Tue, Aug 31, 2027 | 19:48 | 0° |
| Henge | Sunset | Aug 27, 2027 to Aug 31, 2027 | 5 | Tue, Aug 31, 2027 | 19:48 | 0° |

## W wall (faces 274°, 65 m)

| Light | When | Dates | Days | Best day | Time | Sun height |
|---|---|---|---:|---|---:|---:|
| Henge | Sunset | Mar 26, 2027 to Mar 29, 2027 | 4 | Fri, Mar 26, 2027 | 18:20 | 0.2° |
| Golden | Sunset | Mar 26, 2027 to Apr 7, 2027 | 13 | Fri, Mar 26, 2027 | 18:20 | 0.2° |
| Low sun | Sunset | Mar 26, 2027 to Apr 28, 2027 | 34 | Fri, Mar 26, 2027 | 18:20 | 0.2° |
| Low sun | Sunset | Aug 14, 2027 to Sep 17, 2027 | 35 | Fri, Sep 17, 2027 | 19:09 | 0° |
| Golden | Sunset | Sep 4, 2027 to Sep 17, 2027 | 14 | Fri, Sep 17, 2027 | 19:09 | 0° |
| Henge | Sunset | Sep 14, 2027 to Sep 17, 2027 | 4 | Fri, Sep 17, 2027 | 19:09 | 0° |

## E wall (faces 95°, 83 m)

| Light | When | Dates | Days | Best day | Time | Sun height |
|---|---|---|---:|---|---:|---:|
| Henge | Sunrise | Mar 12, 2027 to Mar 15, 2027 | 4 | Fri, Mar 12, 2027 | 06:24 | 0.2° |
| Golden | Sunrise | Mar 12, 2027 to Mar 24, 2027 | 13 | Fri, Mar 12, 2027 | 06:24 | 0.2° |
| Low sun | Sunrise | Mar 12, 2027 to Apr 12, 2027 | 32 | Fri, Mar 12, 2027 | 06:24 | 0.2° |
| Low sun | Sunrise | Sep 1, 2027 to Oct 2, 2027 | 32 | Sat, Oct 2, 2027 | 07:04 | 0.1° |
| Golden | Sunrise | Sep 20, 2027 to Oct 2, 2027 | 13 | Sat, Oct 2, 2027 | 07:04 | 0.1° |
| Henge | Sunrise | Sep 29, 2027 to Oct 2, 2027 | 4 | Sat, Oct 2, 2027 | 07:04 | 0.1° |

## N wall (faces 5°, 164 m)

The sun never strikes this wall head-on under 15°; it gets only high sun.

## S wall (faces 185°, 115 m)

| Light | When | Dates | Days | Best day | Time | Sun height |
|---|---|---|---:|---|---:|---:|
| Low sun | Sunset | Dec 18, 2026 to Dec 25, 2026 | 8 | Fri, Dec 18, 2026 | 12:16 | 15° |

## SSW wall (faces 213°, 40 m)

| Light | When | Dates | Days | Best day | Time | Sun height |
|---|---|---|---:|---|---:|---:|
| Low sun | Sunset | Nov 12, 2026 to Jan 29, 2027 | 79 | Sun, Dec 20, 2026 | 14:20 | 8.9° |

## 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°. 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 https://hengedays.com/terms.md.