cloud-atlas-ai · muness · Sep 23, 2025 · Sep 23, 2025
diff --git a/package.json b/package.json
@@ -10,7 +10,8 @@
     "version": "node version-bump.mjs && git add manifest.json versions.json",
     "test": "jest",
     "test:watch": "jest --watch",
-    "test:coverage": "jest --coverage"
+    "test:coverage": "jest --coverage",
+    "update-timezones": "node scripts/update-timezones.js"
   },
   "keywords": [],
   "author": "",

diff --git a/scripts/update-timezones.js b/scripts/update-timezones.js
@@ -0,0 +1,160 @@
+#!/usr/bin/env node
+
+/**
+ * Script to update Windows to IANA timezone mappings from Unicode CLDR data
+ *
+ * Usage: node scripts/update-timezones.js
+ *
+ * This script fetches the latest windowsZones.xml from Unicode CLDR project
+ * and updates the timezone mapping in src/icalUtils.ts
+ */
+
+const https = require('https');
+const fs = require('fs');
+const path = require('path');
+
+const CLDR_URL = 'https://raw.githubusercontent.com/unicode-org/cldr/main/common/supplemental/windowsZones.xml';
+const OUTPUT_TS_FILE = path.join(__dirname, '..', 'src', 'generated', 'windowsTimezones.ts');
+const OUTPUT_JSON_FILE = path.join(__dirname, '..', 'src', 'generated', 'windows-to-iana.json');
+const OUTPUT_YAML_FILE = path.join(__dirname, '..', 'src', 'generated', 'windows-to-iana.yaml');
+
+console.log('Fetching Windows timezone mappings from Unicode CLDR...');
+
+https.get(CLDR_URL, (res) => {
+  let data = '';
+
+  res.on('data', (chunk) => {
+    data += chunk;
+  });
+
+  res.on('end', () => {
+    try {
+      const mappings = parseWindowsZones(data);
+
+      // Ensure output directory exists
+      const generatedDir = path.dirname(OUTPUT_TS_FILE);
+      if (!fs.existsSync(generatedDir)) {
+        fs.mkdirSync(generatedDir, { recursive: true });
+      }
+
+      generateTypeScriptFile(mappings);
+      generateJsonFile(mappings);
+      generateYamlFile(mappings);
+
+      console.log(`✅ Successfully updated ${Object.keys(mappings).length} timezone mappings`);
+      console.log(`📁 TypeScript: ${OUTPUT_TS_FILE}`);
+      console.log(`📁 JSON: ${OUTPUT_JSON_FILE}`);
+      console.log(`📁 YAML: ${OUTPUT_YAML_FILE}`);
+    } catch (error) {
+      console.error('❌ Error parsing timezone data:', error.message);
+      process.exit(1);
+    }
+  });
+}).on('error', (err) => {
+  console.error('❌ Error fetching timezone data:', err.message);
+  process.exit(1);
+});
+
+function parseWindowsZones(xmlData) {
+  const mappings = {};
+
+  // Extract mapZone elements with territory="001" (primary mappings)
+  const mapZoneRegex = /<mapZone[^>]*other="([^"]*)"[^>]*territory="001"[^>]*type="([^"]*)"/g;
+
+  let match;
+  while ((match = mapZoneRegex.exec(xmlData)) !== null) {
+    const windowsZone = match[1];
+    const ianaZone = match[2];
+
+    // Take the first IANA zone if multiple are specified
+    const primaryIanaZone = ianaZone.split(' ')[0];
+
+    mappings[windowsZone] = primaryIanaZone;
+  }
+
+  return mappings;
+}
+
+function generateTypeScriptFile(mappings) {
+  const timestamp = new Date().toISOString();
+
+  const content = `/**
+ * Windows to IANA timezone mappings
+ *
+ * Generated from Unicode CLDR windowsZones.xml
+ * Last updated: ${timestamp}
+ * Source: https://github.com/unicode-org/cldr/blob/main/common/supplemental/windowsZones.xml
+ *
+ * To update this file, run: node scripts/update-timezones.js
+ */
+
+export const WINDOWS_TO_IANA_TIMEZONES: Record<string, string> = ${JSON.stringify(mappings, null, 2)};
+
+/**
+ * Get IANA timezone identifier for a Windows timezone name
+ * @param windowsTimezone Windows timezone name (e.g., "Eastern Standard Time")
+ * @returns IANA timezone identifier (e.g., "America/New_York") or undefined if not found
+ */
+export function getIanaTimezone(windowsTimezone: string): string | undefined {
+  return WINDOWS_TO_IANA_TIMEZONES[windowsTimezone];
+}
+
+/**
+ * Get all supported Windows timezone names
+ * @returns Array of Windows timezone names
+ */
+export function getSupportedWindowsTimezones(): string[] {
+  return Object.keys(WINDOWS_TO_IANA_TIMEZONES);
+}
+`;
+
+  fs.writeFileSync(OUTPUT_TS_FILE, content, 'utf8');
+}
+
+function generateJsonFile(mappings) {
+  const timestamp = new Date().toISOString();
+
+  const jsonData = {
+    metadata: {
+      description: "Windows to IANA timezone mappings",
+      source: "Unicode CLDR windowsZones.xml",
+      sourceUrl: "https://github.com/unicode-org/cldr/blob/main/common/supplemental/windowsZones.xml",
+      lastUpdated: timestamp,
+      updateCommand: "node scripts/update-timezones.js",
+      totalMappings: Object.keys(mappings).length
+    },
+    mappings: mappings
+  };
+
+  fs.writeFileSync(OUTPUT_JSON_FILE, JSON.stringify(jsonData, null, 2), 'utf8');
+}
+
+function generateYamlFile(mappings) {
+  const timestamp = new Date().toISOString();
+
+  let yamlContent = `# Windows to IANA timezone mappings
+#
+# Generated from Unicode CLDR windowsZones.xml
+# Last updated: ${timestamp}
+# Source: https://github.com/unicode-org/cldr/blob/main/common/supplemental/windowsZones.xml
+#
+# To update this file, run: node scripts/update-timezones.js
+
+metadata:
+  description: "Windows to IANA timezone mappings"
+  source: "Unicode CLDR windowsZones.xml"
+  sourceUrl: "https://github.com/unicode-org/cldr/blob/main/common/supplemental/windowsZones.xml"
+  lastUpdated: "${timestamp}"
+  updateCommand: "node scripts/update-timezones.js"
+  totalMappings: ${Object.keys(mappings).length}
+
+mappings:
+`;
+
+  // Convert mappings to YAML format
+  for (const [windowsZone, ianaZone] of Object.entries(mappings)) {
+    yamlContent += `  "${windowsZone}": "${ianaZone}"\n`;
+  }
+
+  fs.writeFileSync(OUTPUT_YAML_FILE, yamlContent, 'utf8');
+}
diff --git a/src/generated/windows-to-iana.json b/src/generated/windows-to-iana.json
@@ -0,0 +1,151 @@
+{
+  "metadata": {
+    "description": "Windows to IANA timezone mappings",
+    "source": "Unicode CLDR windowsZones.xml",
+    "sourceUrl": "https://github.com/unicode-org/cldr/blob/main/common/supplemental/windowsZones.xml",
+    "lastUpdated": "2025-09-23T01:28:13.315Z",
+    "updateCommand": "node scripts/update-timezones.js",
+    "totalMappings": 139
+  },
+  "mappings": {
+    "Dateline Standard Time": "Etc/GMT+12",
+    "UTC-11": "Etc/GMT+11",
+    "Aleutian Standard Time": "America/Adak",
+    "Hawaiian Standard Time": "Pacific/Honolulu",
+    "Marquesas Standard Time": "Pacific/Marquesas",
+    "Alaskan Standard Time": "America/Anchorage",
+    "UTC-09": "Etc/GMT+9",
+    "Pacific Standard Time (Mexico)": "America/Tijuana",
+    "UTC-08": "Etc/GMT+8",
+    "Pacific Standard Time": "America/Los_Angeles",
+    "US Mountain Standard Time": "America/Phoenix",
+    "Mountain Standard Time (Mexico)": "America/Mazatlan",
+    "Mountain Standard Time": "America/Denver",
+    "Yukon Standard Time": "America/Whitehorse",
+    "Central America Standard Time": "America/Guatemala",
+    "Central Standard Time": "America/Chicago",
+    "Easter Island Standard Time": "Pacific/Easter",
+    "Central Standard Time (Mexico)": "America/Mexico_City",
+    "Canada Central Standard Time": "America/Regina",
+    "SA Pacific Standard Time": "America/Bogota",
+    "Eastern Standard Time (Mexico)": "America/Cancun",
+    "Eastern Standard Time": "America/New_York",
+    "Haiti Standard Time": "America/Port-au-Prince",
+    "Cuba Standard Time": "America/Havana",
+    "US Eastern Standard Time": "America/Indianapolis",
+    "Turks And Caicos Standard Time": "America/Grand_Turk",
+    "Paraguay Standard Time": "America/Asuncion",
+    "Atlantic Standard Time": "America/Halifax",
+    "Venezuela Standard Time": "America/Caracas",
+    "Central Brazilian Standard Time": "America/Cuiaba",
+    "SA Western Standard Time": "America/La_Paz",
+    "Pacific SA Standard Time": "America/Santiago",
+    "Newfoundland Standard Time": "America/St_Johns",
+    "Tocantins Standard Time": "America/Araguaina",
+    "E. South America Standard Time": "America/Sao_Paulo",
+    "SA Eastern Standard Time": "America/Cayenne",
+    "Argentina Standard Time": "America/Buenos_Aires",
+    "Greenland Standard Time": "America/Godthab",
+    "Montevideo Standard Time": "America/Montevideo",
+    "Magallanes Standard Time": "America/Punta_Arenas",
+    "Saint Pierre Standard Time": "America/Miquelon",
+    "Bahia Standard Time": "America/Bahia",
+    "UTC-02": "Etc/GMT+2",
+    "Azores Standard Time": "Atlantic/Azores",
+    "Cape Verde Standard Time": "Atlantic/Cape_Verde",
+    "UTC": "Etc/UTC",
+    "GMT Standard Time": "Europe/London",
+    "Greenwich Standard Time": "Atlantic/Reykjavik",
+    "Sao Tome Standard Time": "Africa/Sao_Tome",
+    "Morocco Standard Time": "Africa/Casablanca",
+    "W. Europe Standard Time": "Europe/Berlin",
+    "Central Europe Standard Time": "Europe/Budapest",
+    "Romance Standard Time": "Europe/Paris",
+    "Central European Standard Time": "Europe/Warsaw",
+    "W. Central Africa Standard Time": "Africa/Lagos",
+    "Jordan Standard Time": "Asia/Amman",
+    "GTB Standard Time": "Europe/Bucharest",
+    "Middle East Standard Time": "Asia/Beirut",
+    "Egypt Standard Time": "Africa/Cairo",
+    "E. Europe Standard Time": "Europe/Chisinau",
+    "Syria Standard Time": "Asia/Damascus",
+    "West Bank Standard Time": "Asia/Hebron",
+    "South Africa Standard Time": "Africa/Johannesburg",
+    "FLE Standard Time": "Europe/Kiev",
+    "Israel Standard Time": "Asia/Jerusalem",
+    "South Sudan Standard Time": "Africa/Juba",
+    "Kaliningrad Standard Time": "Europe/Kaliningrad",
+    "Sudan Standard Time": "Africa/Khartoum",
+    "Libya Standard Time": "Africa/Tripoli",
+    "Namibia Standard Time": "Africa/Windhoek",
+    "Arabic Standard Time": "Asia/Baghdad",
+    "Turkey Standard Time": "Europe/Istanbul",
+    "Arab Standard Time": "Asia/Riyadh",
+    "Belarus Standard Time": "Europe/Minsk",
+    "Russian Standard Time": "Europe/Moscow",
+    "E. Africa Standard Time": "Africa/Nairobi",
+    "Iran Standard Time": "Asia/Tehran",
+    "Arabian Standard Time": "Asia/Dubai",
+    "Astrakhan Standard Time": "Europe/Astrakhan",
+    "Azerbaijan Standard Time": "Asia/Baku",
+    "Russia Time Zone 3": "Europe/Samara",
+    "Mauritius Standard Time": "Indian/Mauritius",
+    "Saratov Standard Time": "Europe/Saratov",
+    "Georgian Standard Time": "Asia/Tbilisi",
+    "Volgograd Standard Time": "Europe/Volgograd",
+    "Caucasus Standard Time": "Asia/Yerevan",
+    "Afghanistan Standard Time": "Asia/Kabul",
+    "West Asia Standard Time": "Asia/Tashkent",
+    "Ekaterinburg Standard Time": "Asia/Yekaterinburg",
+    "Pakistan Standard Time": "Asia/Karachi",
+    "Qyzylorda Standard Time": "Asia/Qyzylorda",
+    "India Standard Time": "Asia/Calcutta",
+    "Sri Lanka Standard Time": "Asia/Colombo",
+    "Nepal Standard Time": "Asia/Katmandu",
+    "Central Asia Standard Time": "Asia/Bishkek",
+    "Bangladesh Standard Time": "Asia/Dhaka",
+    "Omsk Standard Time": "Asia/Omsk",
+    "Myanmar Standard Time": "Asia/Rangoon",
+    "SE Asia Standard Time": "Asia/Bangkok",
+    "Altai Standard Time": "Asia/Barnaul",
+    "W. Mongolia Standard Time": "Asia/Hovd",
+    "North Asia Standard Time": "Asia/Krasnoyarsk",
+    "N. Central Asia Standard Time": "Asia/Novosibirsk",
+    "Tomsk Standard Time": "Asia/Tomsk",
+    "China Standard Time": "Asia/Shanghai",
+    "North Asia East Standard Time": "Asia/Irkutsk",
+    "Singapore Standard Time": "Asia/Singapore",
+    "W. Australia Standard Time": "Australia/Perth",
+    "Taipei Standard Time": "Asia/Taipei",
+    "Ulaanbaatar Standard Time": "Asia/Ulaanbaatar",
+    "Aus Central W. Standard Time": "Australia/Eucla",
+    "Transbaikal Standard Time": "Asia/Chita",
+    "Tokyo Standard Time": "Asia/Tokyo",
+    "North Korea Standard Time": "Asia/Pyongyang",
+    "Korea Standard Time": "Asia/Seoul",
+    "Yakutsk Standard Time": "Asia/Yakutsk",
+    "Cen. Australia Standard Time": "Australia/Adelaide",
+    "AUS Central Standard Time": "Australia/Darwin",
+    "E. Australia Standard Time": "Australia/Brisbane",
+    "AUS Eastern Standard Time": "Australia/Sydney",
+    "West Pacific Standard Time": "Pacific/Port_Moresby",
+    "Tasmania Standard Time": "Australia/Hobart",
+    "Vladivostok Standard Time": "Asia/Vladivostok",
+    "Lord Howe Standard Time": "Australia/Lord_Howe",
+    "Bougainville Standard Time": "Pacific/Bougainville",
+    "Russia Time Zone 10": "Asia/Srednekolymsk",
+    "Magadan Standard Time": "Asia/Magadan",
+    "Norfolk Standard Time": "Pacific/Norfolk",
+    "Sakhalin Standard Time": "Asia/Sakhalin",
+    "Central Pacific Standard Time": "Pacific/Guadalcanal",
+    "Russia Time Zone 11": "Asia/Kamchatka",
+    "New Zealand Standard Time": "Pacific/Auckland",
+    "UTC+12": "Etc/GMT-12",
+    "Fiji Standard Time": "Pacific/Fiji",
+    "Chatham Islands Standard Time": "Pacific/Chatham",
+    "UTC+13": "Etc/GMT-13",
+    "Tonga Standard Time": "Pacific/Tongatapu",
+    "Samoa Standard Time": "Pacific/Apia",
+    "Line Islands Standard Time": "Pacific/Kiritimati"
+  }
+}