Summer Solstice (Xiàzhì)
The longest day of the year — the Northern Hemisphere has its maximum daylight hours.
Summer Solstice (Xiàzhì) — Dates by Year
| Year | Gregorian Date | Day |
|---|---|---|
| 2024 | 6/21 | Fri |
| 2025 | 6/21 | Sat |
| 2026← this year | 6/21 | Sun |
| 2027 | 6/21 | Mon |
| 2028 | 6/21 | Wed |
| 2029 | 6/21 | Thu |
| 2030 | 6/21 | Fri |
Introduction
The Summer Solstice is the tenth solar term, falling around June 21–22 when the sun reaches 90° and shines directly on the Tropic of Cancer. This is the Northern Hemisphere's longest day and shortest night; areas north of the Arctic Circle experience the midnight sun. After the solstice, days begin to shorten. Classical texts say: "On this day the sun is farthest north and daylight is longest — hence Summer Solstice."
Tropic of Cancer in Taiwan
The Tropic of Cancer passes through Chiayi County and Hualien, making Taiwan a special place to observe this solar event. The Tropic of Cancer Monument Park in Shuishang, Chiayi holds an annual summer solstice event where a specially designed sundial casts no shadow at solar noon — a spectacular demonstration of "vertical stick, no shadow" that draws astronomy enthusiasts each year.
Festive Foods
Summer Solstice noodles are a northern Chinese tradition — eating noodles on this day brings health and a clear complexion. In Taiwan, chilled desserts rule the summer: shaved ice, aiyu jelly, grass jelly, and tangyuan are peak-season treats at every night market. Watermelons and honeydew melons hit peak sweetness, making them the quintessential summer solstice fruits.
Wellness
Summer Solstice is when yang energy peaks — the ideal time for "treating winter diseases in summer" (dōng bìng xià zhì). Traditional Chinese medicine's "sanfu patch" therapy applies warming herbal plasters to acupressure points during the hottest period to treat cold-type conditions like asthma and rhinitis. Eat cooling foods: duck, bitter melon, and lotus seeds. Even in peak heat, avoid excessive ice-cold drinks, which can damage the spleen's yang energy.