Each major exchange publishes its annual schedule directly (NYSE and Nasdaq through their websites and iCal exports, LSE through its trading services pages, JPX through its calendar PDF, Euronext through its market hours page). Mirroring those into a curated sheet is the most reliable approach. Commercial vendors aggregate the lot into a single feed.

Store each closure as full-day or half-day, and for half-days store the early-close time in the exchange's local time zone. The page renders this as a column in the closure table and also surfaces it in the body where users would expect to see it. NYSE half-days typically close at 13:00 ET, LSE half-days around 12:30 GMT.

Settlement rules (T+1 for US equities since May 2024, T+2 for many European venues) are stored once per exchange row, not per holiday. The page renders the prevailing rule in a dedicated section so traders see, for example, that an NYSE Thursday holiday means Friday settles next Tuesday under T+1 (counting Wednesday from the trade date).

Asian exchanges like SGX and HKEX run morning and afternoon sessions with a midday break. Store session boundaries per exchange so the page can render normal trading hours alongside holiday-shortened hours. A holiday that affects only the afternoon session can be flagged explicitly in the closure row.

Yes. Either include previous-year closure counts on the row for a small comparison block, or run a parallel page group at /market-holidays/{slug}-2025/ that stays live as an archive. Year-over-year comparisons can be useful for traders evaluating volume thinness patterns around holidays.

Yes. SleekRank registers every generated URL with the sitemap and noindexes the base template page so only exchange URLs get crawled. The cluster of exchange URLs forms a stable hub-and-spoke content structure that compounds authority across years.

The same dataset powering the per-exchange pages can drive an internal API used by broker platforms to disable order entry on closed days, surface half-day warnings, or pre-calculate settlement dates. The pages are the SEO surface, the API is the product integration, and both read from one source so they stay synchronized.

Yes. Hurricane Sandy in 2012 and the funeral of President George H.W. Bush in 2018 caused unscheduled NYSE closures. Add unscheduled events to the source as they happen and let the cache refresh propagate. The page should also include a small section noting how unscheduled closures are typically handled, which builds trust with the audience.