# Customs House, Sydney: henge days

> 10 henge days a year on 2 walls. Next: sunrise square to the E wall, Mar 8, 2027 to Mar 10, 2027, best Wed, Mar 10, 2027 at 06:51.

Southern hemisphere: the north-facing facade is the sunny one, head-on near solar noon.

Computed on Oct 13, 2026 for the 12 months to Oct 13, 2027, from the OpenStreetMap outline (way/351374509). Times are local to Sydney (Australia/Sydney). Open it in the app: https://hengedays.com/?example=customs-house-sydney. Machine-readable: https://hengedays.com/henge/customs-house-sydney.json.

## E wall (faces 95°, 45 m)

| Light | When | Dates | Days | Best day | Time | Sun height |
|---|---|---|---:|---|---:|---:|
| Golden | Sunrise | Oct 13, 2026 | 1 | Tue, Oct 13, 2026 | 06:47 | 5.6° |
| Low sun | Sunrise | Oct 13, 2026 to Oct 27, 2026 | 15 | Tue, Oct 13, 2026 | 06:47 | 5.6° |
| Low sun | Sunrise | Feb 16, 2027 to Mar 10, 2027 | 23 | Wed, Mar 10, 2027 | 06:51 | 0.1° |
| Golden | Sunrise | Mar 1, 2027 to Mar 10, 2027 | 10 | Wed, Mar 10, 2027 | 06:51 | 0.1° |
| Henge | Sunrise | Mar 8, 2027 to Mar 10, 2027 | 3 | Wed, Mar 10, 2027 | 06:51 | 0.1° |
| Henge | Sunrise | Oct 5, 2027 to Oct 6, 2027 | 2 | Tue, Oct 5, 2027 | 06:30 | 0.3° |
| Golden | Sunrise | Oct 5, 2027 to Oct 13, 2027 | 9 | Tue, Oct 5, 2027 | 06:30 | 0.3° |
| Low sun | Sunrise | Oct 5, 2027 to Oct 13, 2027 | 9 | Tue, Oct 5, 2027 | 06:30 | 0.3° |

## W wall (faces 275°, 42 m)

| Light | When | Dates | Days | Best day | Time | Sun height |
|---|---|---|---:|---|---:|---:|
| Low sun | Sunset | Mar 11, 2027 to Apr 1, 2027 | 22 | Thu, Apr 1, 2027 | 18:47 | 0.3° |
| Golden | Sunset | Mar 24, 2027 to Apr 1, 2027 | 9 | Thu, Apr 1, 2027 | 18:47 | 0.3° |
| Henge | Sunset | Mar 31, 2027 to Apr 1, 2027 | 2 | Thu, Apr 1, 2027 | 18:47 | 0.3° |
| Henge | Sunset | Sep 11, 2027 to Sep 13, 2027 | 3 | Sat, Sep 11, 2027 | 17:41 | 0.2° |
| Golden | Sunset | Sep 11, 2027 to Sep 20, 2027 | 10 | Sat, Sep 11, 2027 | 17:41 | 0.2° |
| Low sun | Sunset | Sep 11, 2027 to Oct 3, 2027 | 23 | Sat, Sep 11, 2027 | 17:41 | 0.2° |

## N wall (faces 3°, 45 m)

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

## S wall (faces 187°, 44 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°. 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.