Hello all, Just a friendly reminder that you may get help from the A0 Time Zone Migration utilities to programatically get the diffs between tzdb releases, so you can check/correct your data once a new tzdb is installed in your systems. Documentation for this OSS project is at: https://a0.github.io/a0-tzmigration/ <https://a0.github.io/a0-tzmigration/> for ruby and javascript. Examples of latest changes from 2018e to 2018f for: - Europe/Volgograd https://a0.github.io/a0-tzmigration/demo/?ta=Europe%2FVolgograd&va=2018e&tb=... <https://a0.github.io/a0-tzmigration/demo/?ta=Europe/Volgograd&va=2018e&tb=Eu...> - Pacific/Fiji https://a0.github.io/a0-tzmigration/demo/?ta=Pacific%2FFiji&va=2018e&tb=Paci... <https://a0.github.io/a0-tzmigration/demo/?ta=Pacific/Fiji&va=2018e&tb=Pacifi...> - America/Santiago https://a0.github.io/a0-tzmigration/demo/?ta=America%2FSantiago&va=2018e&tb=... <https://a0.github.io/a0-tzmigration/demo/?ta=America/Santiago&va=2018e&tb=Am...> from 2018f to 2018g for: - Africa/Casablanca: https://a0.github.io/a0-tzmigration/demo/?ta=Africa%2FCasablanca&va=2018f&tb... <https://a0.github.io/a0-tzmigration/demo/?ta=Africa/Casablanca&va=2018f&tb=A...> Getting the same diff in code is as simple as the following: import { TZVersion } from 'a0-tzmigration-js' // calculate changes from America/Santiago 2018e to America/Santiago 2018f let version_a = new TZVersion('America/Santiago', '2018e') let version_b = new TZVersion('America/Santiago', '2018f') let changes = await version_a.changes(version_b) console.log(changes) HTH, — Aldrin.