72 Seasons: ShichijūnikoJapan's 72 micro-seasons
A year is made of seventy-two seasons.
Download on the App StoreFeatures
Today's Season
See the current micro-season at a glance — its poetic name, reading, meaning and exact dates — with a progress bar through the current solar term and a countdown to the next turning.
The 72 Seasons Guide
Browse all seventy-two micro-seasons in one almanac, grouped by solar term, each with its reading, its story and this year's dates.
The 24 Solar Terms
From Risshun, the first spring, to Tōji, the longest night — the deeper rhythm of the year laid out in a single grid.
Your seasonal journal
Leave a note and a photo on any of the 72 seasons. Open the same season a year later and read what you noticed. Everything stays on your device.
Home Screen Widget
Today's micro-season, always on your home screen. The widget quietly changes every five days or so — a tiny surprise of the calendar.
Precise Astronomy
Every date is computed from the sun's actual position along the ecliptic (solar longitude), not copied from fixed tables — so each season begins exactly when it should.
Both hemispheres
Seasons are reversed south of the equator. Switch in settings and the 72 seasons realign to your own spring, summer, autumn and winter.
Offline and Private
Works completely offline, collects no data and requests no permissions. A one-time purchase with no ads and no subscriptions.
Screenshots
FAQ
How accurate are the dates?
The dates are computed astronomically from the sun's position along the ecliptic (solar longitude), the same principle used by official almanacs in Japan. Each season's start date is calculated for the current year rather than taken from a fixed table, so it stays accurate year after year.
Does the app work offline?
Yes, completely. All astronomical calculations run on your device, so the app never needs an internet connection — not even once.
Does it need my location or an account?
No. The app requests no permissions at all — no location, no notifications, no tracking — and there is nothing to sign up for. It collects no data whatsoever.
What are the 72 seasons (shichijūniko)?
In the traditional Japanese calendar, the year is divided into 24 solar terms (sekki), and each of those into three micro-seasons of about five days — 72 in all. Each has a poetic name describing a small change in nature, such as "East wind melts the ice" or "Mist starts to linger."
How do I set up the widget?
Touch and hold an empty area of your home screen, tap the + (or Edit) button in the corner, search for "72 Seasons", choose a widget size and tap "Add Widget". The widget updates by itself as the seasons turn.