The IANA time zone database (tzdb) is the authoritative source for daylight saving rules globally. It carries explicit start and end dates for the past century, derived from legislation in each jurisdiction, and projects forward as long as current rules stand. Around 600 zones observe DST today, and policy changes ripple through the database on a regular release cadence.

SleekRank reads the tzdb data as a normalized JSON or CSV with one row per jurisdiction. The route mounts at /time/dst/{slug}/ where slugs match IANA names normalized like america-new-york or europe-london. Each page shows this year's spring forward and fall back dates, the year-by-year transition table for the next decade, a historical timeline, and a short note about the underlying rule like "second Sunday in March" or "last Sunday in October."

When the EU finally moves on its long-discussed DST abolition, you update one source file and every European page rebuilds. When a US state opts out (Arizona, Hawaii) or proposes opting out, the rule row carries that note. The editorial team does not chase legislation across thousands of posts.

Daylight saving is policy-driven. Jurisdictions change rules on a whim, sometimes with weeks of notice. The Knesset can move Israel's transitions.

The EU has been discussing abolition for years. US states regularly propose ending the switch. An editorial workflow that depends on writers updating posts when policy changes will always lag the truth by months.

SleekRank moves the dependency. The site reads tzdb, and tzdb is updated by the maintainers within days of any policy change anywhere in the world. When tzdb ships, the publisher pulls and pushes, and every page in the affected jurisdictions updates.

The editorial team is freed to write the policy explainer, the historical retrospective, the trip-planning angle, instead of chasing dates. The site becomes a thin presentation layer over a canonical record, which is the right architecture for any reference-driven topic. The same pattern extends to other time-related content like leap second history, calendar reform timelines, and time zone offset histories, all sharing the tzdb backbone.