Where October is busiest: Glentio's calendar, by the numbers

Every "best cities to visit this autumn" list is written from the author's taste. This one is counted. Glentio lists three kinds of thing in a city: events an organiser published on the platform, listings our daily scan sourced from the city's own cultural agenda and re-checks against it, and bookable experiences from our partner's catalogue. On the morning of October 5, 2026, I counted all three for every city we cover. The table is the result; the method is at the end so anyone can repeat it.

The table

Sourced listings are the pages in Glentio's sitemap under each city on October 5. Dated in October counts the listings in that morning's scan with a start date between October 5 and October 31. Experiences is the size of the partner catalogue for the city as read on October 1.

Twenty-two of the forty-odd places we cover; the rest hold fewer than 45 sourced listings and are on the destinations page.

What the counts say

New York is the deepest calendar we hold, and it is not close. 318 sourced listings, most of them from a handful of institutions that publish properly: Lincoln Center, Cooper Union, the early-music network behind the Midtown Concerts, the park conservancies. Fifty-seven of them have a date in October, which is the second-highest count in the table. The New York story is built from them.

Palma has the most dated October listings of any city, by a distance. Ninety-three, and almost all of them from one source, the city council's PalmaCultura agenda, which publishes its library and civic programme weeks ahead with times and addresses. That is why a city of 400,000 outranks Paris here: not because more happens in Palma, but because Palma writes it down. The Palma story is the reader's version.

Chicago, Warsaw, Dublin and Valencia punch above their size. Each has more dated October listings than Paris or Madrid, and in each case it is the same reason: a park district, a city portal or a tourism board that publishes dated, addressed events. Dublin's 35 come largely from the national cultural institutions; Valencia's 29 are its October fiestas, circus festival included.

Madrid and Brussels are the gap. Madrid holds 93 sourced listings but only 13 dated in October, nearly all from Casa de América; the city's municipal agenda is harder to read by machine than Paris's or Vienna's. Brussels has 73 listings and two October dates. Both cities have plenty on; the numbers measure what their agendas publish in a form a scan can verify, and they are a fair warning that a quiet count is not a quiet city.

The partner catalogue tells a different story. Paris (443), Barcelona (424), Rome (417), London (398) and Amsterdam (380) lead on bookable experiences, which track the tourist economy rather than the cultural calendar. The interesting cities are the ones high on both lists: Rome, Vienna and Lisbon have a published programme and a booking market, and they are the places where a week of free afternoons and a couple of paid days fit together.

How to read it, and how not to

The sourced count measures a city's publishing habit as much as its programme. A city that lists its library storytelling sessions one by one, as Palma does, will always outscore one that publishes a monthly PDF. The dated count is better for "what can I do next week", and it is the one that moves: it was taken from a single morning's scan and will look different on November 5.

The experience count is a market, not a judgment. A city with a large catalogue has a lot of tours and tickets on sale; it says nothing about whether you need one.

For Europeans

If the question is "where is there the most to do for nothing in October", the answer by these numbers is Palma, Valencia, Warsaw and Dublin, all of them short flights and all four with a city or tourism agenda that keeps publishing through the autumn. Vienna and Lisbon are the balanced picks.

For visitors from the US

New York needs no persuading. Among the European cities, Rome and Paris have the deepest booking catalogues and a real published programme; Palma is the surprise, and the long weekend of October 10 to 12 is its best weekend of the month.

Method

• Sourced listings: the count of URLs under /free/{city}/ in Glentio's sitemap on October 5, 2026.
• Dated in October: the rows in the October 5 scan with a start date from October 5 to October 31, 2026, grouped by city. The scan reads official city, venue and tourism-board agendas daily and re-verifies each listing against its source.
• Experiences: the number of items per city in the partner catalogue as read on October 1, 2026.
• Asia and Pacific places are not covered and are not in the table.