The 24 Solar Terms and 72 Microseasons

The 24 solar terms (nijūshi sekki) divide the year into 24 seasons by the movement of the sun, and the 72 kō divide it further. Eto months change at the setsu terms. Dates run from Risshun 2026 to Daikan 2027.

TermNameDate72 kō
立春Risshun
Start of Spring
Feb 4, 2026East winds melt the ice
Bush warblers start singing
Fish emerge from the ice
雨水Usui
Rain Water
Feb 19, 2026Rain moistens the soil
Mist starts to linger
Grass and trees sprout
啓蟄Keichitsu
Awakening of Insects
Mar 5, 2026Hibernating insects open their doors
Peach blossoms start to smile
Caterpillars become butterflies
春分Shunbun
Spring Equinox
Mar 20, 2026Sparrows start to nest
Cherry blossoms start to bloom
Distant thunder
清明Seimei
Clear and Bright
Apr 5, 2026Swallows return
Wild geese fly north
First rainbows appear
穀雨Kokū
Grain Rain
Apr 20, 2026Reeds start to sprout
Last frost, rice seedlings grow
Peonies bloom
立夏Rikka
Start of Summer
May 5, 2026Frogs start singing
Worms surface
Bamboo shoots sprout
小満Shōman
Grain Buds
May 21, 2026Silkworms feast on mulberry
Safflowers bloom
Barley ripens
芒種Bōshu
Grain in Ear
Jun 6, 2026Praying mantises hatch
Rotting grass becomes fireflies
Plums turn yellow
夏至Geshi
Summer Solstice
Jun 21, 2026Self-heal withers
Irises bloom
Crow-dipper sprouts
小暑Shōsho
Minor Heat
Jul 7, 2026Warm winds blow
Lotuses start to bloom
Young hawks learn to fly
大暑Taisho
Major Heat
Jul 23, 2026Paulownias start to bear fruit
Damp earth, humid heat
Great rains sometimes fall
立秋Risshū
Start of Autumn
Aug 7, 2026Cool winds blow
Evening cicadas sing
Thick fog descends
処暑Shosho
End of Heat
Aug 23, 2026Cotton bolls open
Heat starts to die down
Rice ripens
白露Hakuro
White Dew
Sep 7, 2026Dew glistens white on grass
Wagtails sing
Swallows leave
秋分Shūbun
Autumn Equinox
Sep 23, 2026Thunder ceases
Insects close up their doors
Fields are drained
寒露Kanro
Cold Dew
Oct 8, 2026Wild geese arrive
Chrysanthemums bloom
Crickets chirp at the door
霜降Sōkō
Frost Descends
Oct 23, 2026First frost
Light rains fall
Maples and ivy turn color
立冬Rittō
Start of Winter
Nov 7, 2026Camellias start to bloom
The ground starts to freeze
Daffodils give off their scent
小雪Shōsetsu
Minor Snow
Nov 22, 2026Rainbows hide
North wind blows the leaves away
Tachibana oranges turn yellow
大雪Taisetsu
Major Snow
Dec 7, 2026Cold sets in, winter begins
Bears start hibernating
Salmon gather and swim upstream
冬至Tōji
Winter Solstice
Dec 22, 2026Self-heal sprouts
Deer shed their antlers
Barley sprouts under the snow
小寒Shōkan
Minor Cold
Jan 5, 2027Japanese parsley flourishes
Frozen springs start to flow
Pheasants start to call
大寒Daikan
Major Cold
Jan 20, 2027Butterbur buds appear
Mountain streams freeze thick
Hens start to lay

The solar months

Solar monthStarts atStart in 2026
Tiger monthRisshunFeb 4, 2026 5:02
Rabbit monthKeichitsuMar 5, 2026 22:59
Dragon monthSeimeiApr 5, 2026 3:40
Snake monthRikkaMay 5, 2026 20:49
Horse monthBōshuJun 6, 2026 0:48
Goat monthShōshoJul 7, 2026 10:57
Monkey monthRisshūAug 7, 2026 20:43
Rooster monthHakuroSep 7, 2026 23:41
Dog monthKanroOct 8, 2026 15:29
Pig monthRittōNov 7, 2026 18:52
Rat monthTaisetsuDec 7, 2026 11:52
Ox monthShōkanJan 5, 2027 23:10

How the calendar and eto fit together

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