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Seasons & Events

Seoul by season — festivals, holidays and the practical rules that only apply at that time of year.

One Minute in the Morning Shapes the Whole Day! When the Sky Looks Hazy—Where to Check PM2.5, How to Reshuffle, and How to Tell Fog From Pollution

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Seoul air quality guide card image

Some mornings the view from the window looks washed out—fog or pollution, you can’t tell by looking. Here’s the thing: in Korea air quality is everyday information alongside the forecast, and for a visitor, checking the number can change the quality of the whole day. Seoulog covers where to find it, indoor backups, masks, and the humidity test that separates fog from particles.

Money’s Hard Deadline Is Wednesday the 23rd! One Week to Chuseok—the Traveler’s Deadline-Ordered Checklist, Market Eating by Sep 22

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Shopping street at Myondon , Seoul - panoramio

Chuseok (24–27 September) is under a week away. Here’s the thing: the earliest deadline is market food (the markets rest over the holiday) and the unmissable one is money (the 23rd is the last banking day). Nail those two and the holiday becomes its bonus stage—an emptied Seoul. Seoulog lines up four items by deadline, plus three booking checks.

Free Day and Night in Hanbok, No Reservation! Gyeongbokgung Opens at Night to October 2, Wed–Sun From 19:00 for 3,000 Won—300 Same-Day Foreigner Tickets, Plus the Moonlight Tour and Seokjojeon Lotteries [Things Worth Doing in Korea #12]

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This autumn Gyeongbokgung opens at night from September 2 to October 2, Wednesday to Sunday, 19:00–21:30, for 3,000 won. Here’s the thing: in a full hanbok—jeogori with matching skirt or trousers—the four palaces are free day and night with no reservation. Seoulog covers the foreigner same-day tickets, 10,000–30,000 won rentals, the Changdeokgung and Deoksugung lotteries, and how to work around Chuseok.

The Full Circuit Takes a Day, One Section Takes an Hour or Two! The Seoul City Wall Trail—Six Sections, and You Only Need One, With Autumn Timing and What to Bring

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Seoul city wall trail guide card image

Central Seoul was once ringed by a city wall, much of it survives, and a path runs alongside. Here’s the thing: the full circuit is a long way, so on a trip you pick one of six sections. Seoulog covers how to choose, why autumn means a morning start, what to pack, and what to do when you come down.

Only Offices and Banks Close! Hangeul Day 2026 Falls on a Friday—October’s Second Three-Day Weekend (Oct 9–11), and Gwanghwamun Becomes a Festival

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Gyeonghoeru (Royal Banquet Hall) at Gyeongbokgung Palace, Seoul

October 9 is Hangeul Day, and in 2026 it lands on a Friday, so Oct 9–11 is the month’s second three-day weekend. Here’s the thing: unlike Chuseok, commerce runs as normal, while Gwanghwamun Square and the free National Hangeul Museum turn into a festival. Seoulog covers the crowds, the closures and an Insadong calligraphy hour, in three parts.

You Don’t Need a Mountain for Korean Foliage! Seoul’s Four Tiers—From the Secret Garden at Zero Minutes to Bukhansan in Half a Day, With Ginkgos a Week Behind

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Deoksugung Palace in autumn

From late October into early November, Seoul becomes its own foliage destination at zero transit cost. Here’s the thing: the color sits directly on your sightseeing lines—palace eaves, the Namsan loop at dusk, a national park on the subway, and a ginkgo encore a week later. Four tiers, sorted by travel time, each with its one correct answer.

Three Seasons in One Day! October Seoul Swings 10°C—the Packing Formula Is Three Peelable Layers

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Deoksugung Palace 3

The first number to know for October Seoul isn’t the average temperature—it’s the 10°C daily swing. Here’s the thing: you shiver on the morning bus, sweat at Gyeongbokgung at noon, and shiver again by the river at night. Early month 23°/13°, late month 17°/7°. The answer isn’t one warm coat; it’s base + middle + shell. Seoulog lays out the bands and the list.

Free Palaces, an Empty City and Sleepless Dongdaemun—With Zero Reservations! Chuseok Seoul in Three Days (24–27 Sept)

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2007년 10월 13일 서울세계불꽃축제(Seoul international fireworks festival) 17

Holiday Seoul comes with three bonuses: palaces that open free, a city that empties out, and a Dongdaemun that never sleeps. Here’s the thing—you don’t need a single booking. Any three days of 24–27 September work, and the rain substitutes are attached.

Whole Sections Move Together! KBO Postseason in Korea: How the October Series Work and How to Actually Get a Ticket

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KBO postseason baseball guide card image

A Korean ballpark isn’t a place where people sit quietly—there’s a cheer leader, there’s music, and whole sections move together. Here’s the thing: that atmosphere peaks in the October postseason, when big fixtures sell out within minutes. You don’t need to know the rules. Choosing a ground, getting tickets, the evening itself and the small things that help—Seoulog lines them up.

A Full Month Ahead of Seoul! Korea Fall Foliage 2026 Moves South from Seoraksan—Mountains in Mid-October, the City in Early November: The Chasing Map

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Seoraksan in the Fall 1- 설악산 단풍

“Will I see fall foliage in Korea in October?” It depends where—and in central Seoul in early October, mostly not yet. Here’s the thing: Seoraksan leads from late September and Seoul peaks late October to early November. Foliage here is something you chase by crossing dates with places. Seoulog hands you the map, with one rule: one layer more on the mountain.

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