24 demand-moving dates for the Seoul hotel market, compiled 2026-07-27 from public sources. 8 are rated high impact. Dates marked "verify" follow the event's recurring pattern but are not yet officially confirmed — check the source before pricing against them.
| Dates | Event | Impact | Where | Source |
|---|---|---|---|---|
| Seoul's danpung season runs roughly 20 Oct - 20 Nov with the citywide peak typically in early-to-mid November (ginkgo avenues, palace gardens, Bukhansan). KMA publishes the official 2026 forecast in early September; strong inbound leisure driver across shoulder-season weekends. verify | Autumn foliage peak 2026 (Seoul palaces, Namsan, Bukhansan) cultural | medium | Citywide - Gyeongbokgung/Changdeokgung, Namsan, Bukhansan, Olympic Park | source ↗ |
| 2026-11-01 | JTBC Seoul Marathon 2026 sports Confirmed for Sunday 1 Nov 2026; one of Korea's two biggest mass marathons (~35,000+ runners) with a growing international field. Course runs Sangam World Cup Park to Olympic Park, compressing hotels citywide over the race weekend. | high | Citywide course - Sangam World Cup Park start, Olympic Park finish | source ↗ |
| 2026-11-11 → 2026-11-14 | 25th Seoul International Cafe Show 2026 trade_fair Confirmed 11-14 Nov 2026 at COEX; Asia's largest coffee/F&B trade show with 160,000+ visitors from ~80 countries and hundreds of international exhibitors. Fills Gangnam/COEX-area hotels mid-week through the weekend. | medium | COEX, Gangnam | source ↗ |
| 2026-11-18 → 2026-11-20 | Korea MICE Expo 2026 (KME 2026) conference Announced for 18-20 Nov 2026 at the newly opened COEX Magok; Korea's flagship MICE-industry trade event with hosted international buyers. Modest room-night volume but concentrated corporate/buyer demand in west Seoul (Magok) and Gangnam. | low | COEX Magok, Gangseo-gu | source ↗ |
| 2026-12-14 → 2027-01-31 | Seoul Winter Festa 2026-27 (incl. Seoul Lantern Festival & Seoul Light DDP) festival Seoul Metropolitan Government lists Seoul Winter Festa from 14 Dec 2026 to 31 Jan 2027 - a citywide winter program bundling the Seoul Lantern Festival along Cheonggyecheon/Gwanghwamun, media-art shows and ice rinks. Draws millions of visits and underpins downtown leisure demand through the holiday season. | medium | Gwanghwamun Square, Cheonggyecheon, DDP and downtown Seoul | source ↗ |
| 2026-12-24 → 2027-01-01 | Christmas & New Year's Eve peak (Bosingak bell-ringing) holiday Christmas is a Korean public holiday (25 Dec) and the 31 Dec Bosingak bell-ringing plus sunrise events drive the strongest leisure compression of the Seoul winter, alongside Myeongdong/Hongdae holiday crowds and Lotte World Tower countdown. Highest ADR nights of the winter for downtown and Gangnam hotels. | high | Citywide - Bosingak (Jongno), Myeongdong, Lotte World Tower | source ↗ |
| 2027-02-06 → 2027-02-09 | Seollal (Korean Lunar New Year) 2027 holiday Lunar New Year falls Sunday 7 Feb 2027; the statutory holiday block runs 6-8 Feb with a substitute holiday on Tuesday 9 Feb, creating a 4-day break. Seoul empties of residents but sees luxury-hotel staycation packages and some inbound regional leisure; net effect on citywide occupancy is modest. | low | Citywide - palaces and Bukchon busiest | source ↗ |
| 2027 dates not yet announced; the F/W edition is held annually in early February at DDP (2026 F/W ran 3-8 Feb). Brings international buyers, press and K-fashion visitors to Dongdaemun/Jung-gu hotels for about a week. verify | Seoul Fashion Week - F/W 2027 edition cultural | medium | Dongdaemun Design Plaza (DDP), Jung-gu | source ↗ |
| 2027-03-10 → 2027-03-12 | InterBattery 2027 trade_fair Official site confirms 10-12 Mar 2027 across COEX Halls A-D, The Platz and Grand Ballroom. Korea's largest battery-industry show (70,000+ trade visitors, strong overseas delegations from the EV/ESS supply chain) - hard compression of Gangnam business hotels. | high | COEX, Gangnam | source ↗ |
| Held annually across all COEX halls in mid-March (2026 edition: 19-22 Mar); aggregator listings show 18-21 Mar 2027 but the official site has not yet published 2027 dates. ~1,300 exhibitors and 70,000+ visitors including large overseas buyer groups. verify | KIMES 2027 (Korea International Medical & Hospital Equipment Show) trade_fair | medium | COEX, Gangnam | source ↗ |
| 2027-03-21 | Seoul Marathon 2027 (Dong-A Marathon) sports Confirmed for Sunday 21 Mar 2027; World Athletics Label race with ~20,000 marathon plus ~20,000 10K bibs that sell out within minutes, and a dedicated international entry window. Gwanghwamun start / Jamsil finish drives citywide race-weekend compression. | high | Gwanghwamun Square start - Jamsil Sports Complex finish | source ↗ |
| Biennial motor show expected in early April 2027 at KINTEX, Goyang (2025 edition ran early-to-mid April with ~500,000 visitors); 2027 dates not yet announced. Held outside Seoul proper but press/trade days and weekend crowds compress Goyang/Ilsan and north-west Seoul hotels. verify | Seoul Mobility Show 2027 trade_fair | medium | KINTEX, Goyang (Seoul-north hotel market) | source ↗ |
| 2027 festival dates not yet announced; Seoul bloom typically peaks early-to-mid April (2026 Yeouido festival: 8-12 Apr) with millions visiting Yeouiseo-ro's 1,800+ cherry trees and Seokchon Lake. The single strongest spring leisure-demand window for Seoul hotels. verify | Cherry blossom peak & Yeouido Spring Flower Festival 2027 festival | high | Yeouido (Yeouiseo-ro) & Seokchon Lake, Jamsil | source ↗ |
| 2027 dates not yet announced; the UNESCO-listed lantern parade along Jongno and celebrations at Jogyesa are normally held the weekend before Buddha's Birthday (13 May 2027), suggesting ~8-9 May 2027. Draws large domestic and international crowds to downtown Seoul. verify | Yeon Deung Hoe 2027 (Lotus Lantern Festival) festival | medium | Jongno / Jogyesa Temple / Gwanghwamun Square | source ↗ |
| 2027-05-13 | Buddha's Birthday holiday 2027 holiday Public holiday on Thursday 13 May 2027 (lunar 8 April), creating bridge-weekend potential Thu-Sun. Temple lantern displays citywide extend the spring leisure season; mainly domestic short-break demand. | low | Citywide - Jogyesa, Bongeunsa temples | source ↗ |
| 2027-06-16 → 2027-06-20 | Seoul International Book Fair 2027 (SIBF) trade_fair Official site confirms 16-20 Jun 2027 at COEX Halls A&B. Korea's largest publishing event with well over 100,000 visitors and international exhibitors/rights buyers; adds solid mid-June demand to Gangnam hotels. | medium | COEX, Gangnam | source ↗ |
| 2027 dates not yet announced; the flagship Seoul edition of the K-pop/hip-hop water festival is held over a July weekend (2026: 24-26 Jul at KINTEX Outdoor Global Stage). Sells tens of thousands of tickets per day with a large inbound Asian fan contingent. verify | Waterbomb Seoul 2027 concert | medium | KINTEX outdoor grounds, Goyang (2026 venue; Seoul-north market) | source ↗ |
| 2027-09-14 → 2027-09-16 | Chuseok holiday 2027 holiday Chuseok falls Wednesday 15 Sep 2027 with the statutory block running 14-16 Sep; many Koreans bridge to a full week off. Outbound/domestic exodus softens corporate demand but drives luxury staycation and inbound regional leisure into Seoul hotels. | medium | Citywide | source ↗ |
| Dates not yet announced; the spring-season edition is held annually in early September at DDP as part of the global fashion-month calendar. Week-long buyer/press influx into Dongdaemun and downtown hotels. verify | Seoul Fashion Week - S/S 2028 edition (Sep 2027) cultural | medium | Dongdaemun Design Plaza (DDP), Jung-gu | source ↗ |
| 2027 date not yet announced. Hanwha's free one-night festival draws ~1 million spectators to the Han River; historically a Saturday in late Sep/early Oct, though the 2026 edition moved earlier to 5 Sep 2026, so the 2027 slot needs verification. Yeouido and riverside hotels sell out on the night. verify | Seoul World Fireworks Festival 2027 festival | high | Yeouido Hangang Park / Han River | source ↗ |
| 2027-10-03 → 2027-10-11 | Early October 2027 holiday cluster (National Foundation Day & Hangeul Day) holiday Two back-to-back long weekends, not one continuous break: National Foundation Day (Sun 3 Oct, substitute Mon 4 Oct) and Hangeul Day (Sat 9 Oct, substitute Mon 11 Oct). Boosts domestic city-break and inbound regional leisure at the start of autumn high season. | low | Citywide | source ↗ |
| 2027-10-19 → 2027-10-24 | Seoul ADEX 2027 (International Aerospace & Defense Exhibition) trade_fair Biennial odd-year airshow listed for 19-24 Oct 2027 at Seoul Airport (Seongnam); Northeast Asia's largest aerospace/defense exhibition with hundreds of foreign delegations on trade days and mass public-day crowds. Compresses Gangnam, Songpa, Pangyo and Seongnam hotels for the full week. | high | Seoul Airport (Seoul Air Base), Seongnam | source ↗ |
| Seasonal window: Seoul foliage typically peaks late October to mid-November; the KMA forecast for 2027 will be published around September 2027. Recurring inbound leisure driver closing out the calendar window. verify | Autumn foliage peak 2027 cultural | medium | Citywide - palaces, Namsan, Bukhansan | source ↗ |
| 2027 date not yet announced; held annually on the first Sunday of November (2026: 1 Nov), pointing to ~7 Nov 2027. ~35,000+ runners with citywide course and finish at Olympic Park. verify | JTBC Seoul Marathon 2027 sports | high | Citywide course - Sangam to Olympic Park | source ↗ |
This is the citywide headline layer — the same format your property calendar ($99/year) delivers, plus your neighborhood, your feeder markets' school breaks, negative drivers, and quarterly refreshes.