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HTML

<!DOCTYPE html>
<html lang="de">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Zeitzonen-Rechner | PonyWave Tools</title>
<meta name="description" content="Berechne Zeiten in verschiedenen Zeitzonen, mit automatischer Erkennung deiner Zeitzone.">
<meta property="og:title" content="Zeitzonen-Rechner | PonyWave Tools">
<meta property="og:description" content="Berechne Zeiten in verschiedenen Zeitzonen, mit automatischer Erkennung deiner Zeitzone.">
<meta property="og:url" content="https://tools.ponywave.de/zeitzonen">
<meta property="og:type" content="website">
<link rel="icon" href="../favicon.png" type="image/png">
<script defer src="https://stats.ponywave.de/script" data-website-id="9ef713d2-adb9-4906-9df5-708d8a8b9131" data-tag="zeitzonen"></script>
<style>
:root {
--bg-color: #f5f5f5;
--text-color: #333;
--primary-color: #7a42f4;
--secondary-color: #f45e42;
--card-bg: #ffffff;
--border-color: #e0e0e0;
--input-bg: #ffffff;
--shadow-color: rgba(0, 0, 0, 0.1);
--accent-color: #42b8f4;
}
[data-theme="dark"] {
--bg-color: #121212;
--text-color: #e0e0e0;
--primary-color: #9966ff;
--secondary-color: #ff7766;
--card-bg: #1e1e1e;
--border-color: #3a3a3a;
--input-bg: #2d2d2d;
--shadow-color: rgba(0, 0, 0, 0.3);
--accent-color: #66ccff;
}
* {
margin: 0;
padding: 0;
box-sizing: border-box;
transition: background-color 0.3s, color 0.3s;
}
body {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
background-color: var(--bg-color);
color: var(--text-color);
line-height: 1.6;
padding: 20px;
min-height: 100vh;
display: flex;
flex-direction: column;
}
header {
margin-bottom: 30px;
text-align: center;
}
h1 {
font-size: 2.5rem;
margin-bottom: 10px;
color: var(--primary-color);
}
h2 {
font-size: 1.5rem;
color: var(--secondary-color);
margin-bottom: 20px;
}
main {
flex: 1;
max-width: 900px;
margin: 0 auto;
width: 100%;
}
.theme-toggle {
position: fixed;
top: 20px;
right: 20px;
background: var(--card-bg);
border: 2px solid var(--border-color);
border-radius: 25px;
padding: 10px;
display: flex;
align-items: center;
justify-content: center;
cursor: pointer;
box-shadow: 0 4px 6px var(--shadow-color);
z-index: 100;
}
.theme-toggle span {
font-size: 1.3rem;
}
.current-time {
background-color: var(--card-bg);
border-radius: 10px;
padding: 20px;
margin-bottom: 30px;
box-shadow: 0 6px 12px var(--shadow-color);
border: 1px solid var(--border-color);
text-align: center;
}
.current-time h2 {
margin-bottom: 15px;
}
.current-time p {
font-size: 2rem;
font-weight: bold;
color: var(--primary-color);
}
.timezone-name {
font-size: 1.2rem;
color: var(--secondary-color);
margin-top: 10px;
}
.timezone-input {
background-color: var(--card-bg);
border-radius: 10px;
padding: 20px;
margin-bottom: 30px;
box-shadow: 0 6px 12px var(--shadow-color);
border: 1px solid var(--border-color);
}
.input-fields {
display: flex;
flex-wrap: wrap;
gap: 15px;
margin-bottom: 20px;
}
.input-group {
flex: 1;
min-width: 200px;
}
.time-input-container {
display: flex;
align-items: center;
justify-content: center;
background-color: var(--input-bg);
border: 1px solid var(--border-color);
border-radius: 5px;
padding: 5px;
}
.time-spinner {
display: flex;
flex-direction: column;
align-items: center;
margin: 0 5px;
}
.time-spinner-value {
font-size: 1.8rem;
font-weight: bold;
color: var(--primary-color);
user-select: none;
width: 40px;
text-align: center;
}
.time-spinner-arrow {
cursor: pointer;
font-size: 1.2rem;
color: var(--secondary-color);
transition: transform 0.2s, color 0.2s;
}
.time-spinner-arrow:hover {
color: var(--primary-color);
transform: scale(1.2);
}
.time-divider {
font-size: 1.8rem;
font-weight: bold;
color: var(--text-color);
margin: 0 5px;
}
label {
display: block;
margin-bottom: 8px;
font-weight: 600;
}
input, select {
width: 100%;
padding: 12px;
border-radius: 5px;
border: 1px solid var(--border-color);
background-color: var(--input-bg);
color: var(--text-color);
font-size: 1rem;
}
button {
background-color: var(--primary-color);
color: white;
border: none;
padding: 12px 20px;
border-radius: 5px;
font-size: 1rem;
cursor: pointer;
transition: background-color 0.3s;
}
button:hover {
background-color: var(--accent-color);
}
.timezone-list {
display: grid;
grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
gap: 20px;
margin-top: 30px;
}
#timezone-result {
display: flex;
justify-content: center;
align-items: center;
gap: 20px;
margin-top: 30px;
}
.arrow-container {
display: flex;
justify-content: center;
align-items: center;
background: transparent;
box-shadow: none;
border: none;
min-width: 80px;
}
.conversion-arrow {
font-size: 2.5rem;
color: var(--secondary-color);
animation: pulse 1.5s infinite;
}
.timezone-card {
background-color: var(--card-bg);
border-radius: 10px;
padding: 20px;
box-shadow: 0 6px 12px var(--shadow-color);
border: 1px solid var(--border-color);
display: flex;
flex-direction: column;
align-items: center;
}
.timezone-card h3 {
color: var(--secondary-color);
margin-bottom: 10px;
text-align: center;
}
.time {
font-size: 1.8rem;
font-weight: bold;
color: var(--primary-color);
margin: 10px 0;
}
.date {
color: var(--text-color);
font-size: 1rem;
}
.heart {
color: #ff4d4d;
animation: pulse 1.5s infinite;
}
@keyframes pulse {
0% { transform: scale(1); }
50% { transform: scale(1.2); }
100% { transform: scale(1); }
}
footer {
margin-top: 50px;
text-align: center;
padding: 20px;
border-top: 1px solid var(--border-color);
}
footer a {
color: var(--primary-color);
text-decoration: none;
}
footer a:hover {
text-decoration: underline;
}
@media (max-width: 768px) {
h1 {
font-size: 2rem;
}
.current-time p {
font-size: 1.6rem;
}
.input-group {
min-width: 100%;
}
#timezone-result {
flex-direction: column;
}
.arrow-container {
transform: rotate(90deg);
margin: 10px 0;
}
}
</style>
</head>
<body>
<div class="theme-toggle" id="theme-toggle" title="Farbmodus wechseln">
<span>🌓</span>
</div>
<header>
<h1>Zeitzonen-Rechner</h1>
<h2>Vergleiche Zeiten weltweit</h2>
</header>
<main>
<div class="current-time">
<h2>Aktuelle Zeit</h2>
<p id="local-time">--:--:--</p>
<div class="timezone-name" id="local-timezone">Deine Zeitzone wird erkannt...</div>
</div>
<div class="timezone-input">
<h2>Zeitzone berechnen</h2>
<div class="input-fields">
<div class="input-group">
<label for="custom-date">Datum</label>
<input type="date" id="custom-date">
</div>
<div class="input-group">
<label>Zeit</label>
<div class="time-input-container">
<!-- Hours -->
<div class="time-spinner">
<div class="time-spinner-arrow" id="hour-up"></div>
<div class="time-spinner-value" id="hour-value">12</div>
<div class="time-spinner-arrow" id="hour-down"></div>
</div>
<div class="time-divider">:</div>
<!-- Minutes -->
<div class="time-spinner">
<div class="time-spinner-arrow" id="minute-up"></div>
<div class="time-spinner-value" id="minute-value">00</div>
<div class="time-spinner-arrow" id="minute-down"></div>
</div>
</div>
<input type="hidden" id="custom-time">
</div>
<div class="input-group">
<label for="source-timezone">Quell-Zeitzone</label>
<select id="source-timezone"></select>
</div>
<div class="input-group">
<label for="target-timezone">Ziel-Zeitzone</label>
<select id="target-timezone"></select>
</div>
</div>
<button id="calculate-btn">Berechnen</button>
</div>
<h2>Ergebnis der Umrechnung</h2>
<div class="timezone-list" id="timezone-result">
<!-- Result cards will be generated here -->
</div>
<h2>Weltzeiten</h2>
<div class="timezone-list" id="timezone-list">
<!-- Timezone cards will be generated here -->
</div>
</main>
<footer>
<p><a href="https://tools.ponywave.de/">Zurück zur Startseite</a> | &copy; <span id="current-year"></span> Akamaru | Made with <span class="heart">❤️</span> by Claude</p>
</footer>
<script>
// Theme handling
const themeToggle = document.getElementById('theme-toggle');
const prefersDarkScheme = window.matchMedia('(prefers-color-scheme: dark)');
// Check for saved theme or use system preference
let currentTheme = localStorage.getItem('theme');
if (!currentTheme) {
currentTheme = prefersDarkScheme.matches ? 'dark' : 'light';
}
// Apply the current theme
document.body.setAttribute('data-theme', currentTheme);
// Toggle theme when button is clicked
themeToggle.addEventListener('click', () => {
const newTheme = currentTheme === 'light' ? 'dark' : 'light';
document.body.setAttribute('data-theme', newTheme);
localStorage.setItem('theme', newTheme);
currentTheme = newTheme;
});
// Set current year in footer
document.getElementById('current-year').textContent = new Date().getFullYear();
// Timezone data
const majorTimezones = [
{ label: "Pacific (Los Angeles)", id: "America/Los_Angeles" },
{ label: "Mountain (Denver)", id: "America/Denver" },
{ label: "Central (Chicago)", id: "America/Chicago" },
{ label: "Eastern (New York)", id: "America/New_York" },
{ label: "Brasilien (São Paulo)", id: "America/Sao_Paulo" },
{ label: "Großbritannien (London)", id: "Europe/London" },
{ label: "Westeuropa (Paris, Berlin)", id: "Europe/Berlin" },
{ label: "Osteuropa (Athen)", id: "Europe/Athens" },
{ label: "Moskau", id: "Europe/Moscow" },
{ label: "Dubai", id: "Asia/Dubai" },
{ label: "Indien (Mumbai)", id: "Asia/Kolkata" },
{ label: "China (Peking)", id: "Asia/Shanghai" },
{ label: "Japan (Tokio)", id: "Asia/Tokyo" },
{ label: "Australien (Sydney)", id: "Australia/Sydney" },
{ label: "Neuseeland (Auckland)", id: "Pacific/Auckland" }
];
// Populate timezone dropdowns
const sourceTimezoneSelect = document.getElementById('source-timezone');
const targetTimezoneSelect = document.getElementById('target-timezone');
majorTimezones.forEach(tz => {
// Für Quell-Zeitzone
const sourceOption = document.createElement('option');
sourceOption.value = tz.id;
sourceOption.textContent = tz.label;
sourceTimezoneSelect.appendChild(sourceOption);
// Für Ziel-Zeitzone
const targetOption = document.createElement('option');
targetOption.value = tz.id;
targetOption.textContent = tz.label;
targetTimezoneSelect.appendChild(targetOption);
});
// Set default values for date and time inputs
const now = new Date();
const dateInput = document.getElementById('custom-date');
const timeInput = document.getElementById('custom-time');
const hourValue = document.getElementById('hour-value');
const minuteValue = document.getElementById('minute-value');
dateInput.value = now.toISOString().split('T')[0];
// Initialize time spinners
const hours = now.getHours();
const minutes = now.getMinutes();
hourValue.textContent = hours.toString().padStart(2, '0');
minuteValue.textContent = minutes.toString().padStart(2, '0');
timeInput.value = `${hours.toString().padStart(2, '0')}:${minutes.toString().padStart(2, '0')}`;
// Time spinner event listeners
document.getElementById('hour-up').addEventListener('click', () => {
let hour = parseInt(hourValue.textContent);
hour = (hour + 1) % 24;
hourValue.textContent = hour.toString().padStart(2, '0');
updateHiddenTimeInput();
});
document.getElementById('hour-down').addEventListener('click', () => {
let hour = parseInt(hourValue.textContent);
hour = (hour - 1 + 24) % 24;
hourValue.textContent = hour.toString().padStart(2, '0');
updateHiddenTimeInput();
});
document.getElementById('minute-up').addEventListener('click', () => {
let minute = parseInt(minuteValue.textContent);
minute = (minute + 1) % 60;
minuteValue.textContent = minute.toString().padStart(2, '0');
updateHiddenTimeInput();
});
document.getElementById('minute-down').addEventListener('click', () => {
let minute = parseInt(minuteValue.textContent);
minute = (minute - 1 + 60) % 60;
minuteValue.textContent = minute.toString().padStart(2, '0');
updateHiddenTimeInput();
});
// Support for dragging the time values up/down
let isDragging = false;
let startY = 0;
let currentElement = null;
function handleDragStart(e, element) {
isDragging = true;
startY = e.clientY || e.touches[0].clientY;
currentElement = element;
}
function handleDragMove(e) {
if (!isDragging || !currentElement) return;
const currentY = e.clientY || e.touches[0].clientY;
const deltaY = startY - currentY;
// Threshold to trigger a change (10px)
if (Math.abs(deltaY) > 10) {
if (currentElement === hourValue) {
if (deltaY > 0) {
document.getElementById('hour-up').click();
} else {
document.getElementById('hour-down').click();
}
startY = currentY;
} else if (currentElement === minuteValue) {
if (deltaY > 0) {
document.getElementById('minute-up').click();
} else {
document.getElementById('minute-down').click();
}
startY = currentY;
}
}
}
function handleDragEnd() {
isDragging = false;
currentElement = null;
}
// Setup drag events for hours
hourValue.addEventListener('mousedown', (e) => handleDragStart(e, hourValue));
hourValue.addEventListener('touchstart', (e) => handleDragStart(e, hourValue));
// Setup drag events for minutes
minuteValue.addEventListener('mousedown', (e) => handleDragStart(e, minuteValue));
minuteValue.addEventListener('touchstart', (e) => handleDragStart(e, minuteValue));
// Global events for move and end
window.addEventListener('mousemove', handleDragMove);
window.addEventListener('touchmove', handleDragMove);
window.addEventListener('mouseup', handleDragEnd);
window.addEventListener('touchend', handleDragEnd);
function updateHiddenTimeInput() {
timeInput.value = `${hourValue.textContent}:${minuteValue.textContent}`;
}
// Detect user's timezone
const localTimezone = Intl.DateTimeFormat().resolvedOptions().timeZone;
document.getElementById('local-timezone').textContent =
`Deine Zeitzone: ${localTimezone} (${getTimezoneOffsetString(now, localTimezone)})`;
// Set initial timezone selection to match user's timezone, if possible
for (let i = 0; i < sourceTimezoneSelect.options.length; i++) {
if (sourceTimezoneSelect.options[i].value === localTimezone) {
sourceTimezoneSelect.selectedIndex = i;
break;
}
}
// Set target timezone initially to different timezone (e.g., New York)
for (let i = 0; i < targetTimezoneSelect.options.length; i++) {
if (targetTimezoneSelect.options[i].value === "America/New_York") {
targetTimezoneSelect.selectedIndex = i;
break;
}
}
// Update local time every second
function updateLocalTime() {
const now = new Date();
document.getElementById('local-time').textContent = now.toLocaleTimeString();
// Auto update world times every minute
if (now.getSeconds() === 0) {
generateTimezoneCards();
}
setTimeout(updateLocalTime, 1000);
}
updateLocalTime();
// Update world times every 30 seconds
setInterval(() => {
generateTimezoneCards();
}, 30000);
// Create timezone cards
function generateTimezoneCards(referenceDate = new Date()) {
const container = document.getElementById('timezone-list');
container.innerHTML = '';
majorTimezones.forEach(tz => {
const card = document.createElement('div');
card.className = 'timezone-card';
// Format time and date using Intl.DateTimeFormat for the specific timezone
const timeFormatter = new Intl.DateTimeFormat('de-DE', { timeZone: tz.id, hour: '2-digit', minute: '2-digit' });
const dateFormatter = new Intl.DateTimeFormat('de-DE', { timeZone: tz.id, year: 'numeric', month: '2-digit', day: '2-digit' });
const timeStr = timeFormatter.format(referenceDate);
const dateStr = dateFormatter.format(referenceDate);
const offsetStr = getTimezoneOffsetString(referenceDate, tz.id);
card.innerHTML = `
<h3>${tz.label}</h3>
<div class="time">${timeStr}</div>
<div class="date">${dateStr}</div>
<div class="timezone-offset">${offsetStr}</div>
`;
container.appendChild(card);
});
}
// Calculate and show timezone results
document.getElementById('calculate-btn').addEventListener('click', () => {
const dateStr = dateInput.value; // "YYYY-MM-DD"
const timeStr = timeInput.value; // "HH:mm"
const sourceTimezoneId = sourceTimezoneSelect.value;
const targetTimezoneId = targetTimezoneSelect.value;
if (!dateStr || !timeStr || !sourceTimezoneId || !targetTimezoneId) {
alert('Bitte gib ein Datum, eine Zeit und beide Zeitzonen an.');
return;
}
try {
// --- Korrekte Logik zur Erstellung des Referenz-Zeitpunkts ---
// 1. Parse input date/time components
const [year, month, day] = dateStr.split('-').map(Number);
const [hours, minutes] = timeStr.split(':').map(Number);
// 2. Helper function to get offset in hours for a given date and timezone
function getOffsetHours(date, timezone) {
try {
const formatter = new Intl.DateTimeFormat('en-US', {
timeZone: timezone,
timeZoneName: 'longOffset' // e.g., GMT-07:00 or GMT+02:00
});
const parts = formatter.formatToParts(date);
const offsetPart = parts.find(part => part.type === 'timeZoneName');
if (offsetPart) {
// Extract hours and minutes from GMT string (e.g., "GMT-7", "GMT+5:30")
const match = offsetPart.value.match(/GMT([-+])(\d{1,2})(?::(\d{2}))?/);
if (match) {
const sign = match[1] === '-' ? -1 : 1;
const hourOffset = parseInt(match[2], 10);
const minuteOffset = match[3] ? parseInt(match[3], 10) : 0;
return sign * (hourOffset + minuteOffset / 60);
}
}
} catch (e) {
console.warn(`Could not determine offset for timezone ${timezone}`, e);
}
// Fallback: Browser's local offset for the given date (less accurate for the *target* zone)
console.warn(`Falling back to local offset for timezone ${timezone}`);
return -date.getTimezoneOffset() / 60;
}
// 3. Estimate the UTC time by initially assuming the input time *was* UTC.
// We need a Date object to pass to getOffsetHours.
const guessedUtcMillis = Date.UTC(year, month - 1, day, hours, minutes);
const tempDate = new Date(guessedUtcMillis);
// 4. Get the actual offset of the source timezone *at that time*.
const sourceOffsetHours = getOffsetHours(tempDate, sourceTimezoneId);
// 5. Calculate the correct UTC milliseconds.
// The input time (e.g., 20:00 Berlin) corresponds to a UTC time that is
// 'sourceOffsetHours' earlier than 20:00 UTC.
// So, we subtract the offset from the initial UTC guess.
const correctUtcMillis = guessedUtcMillis - (sourceOffsetHours * 3600 * 1000);
// 6. Create the final Date object representing the correct moment in time.
const referenceDate = new Date(correctUtcMillis);
// 7. Display the results using this correct referenceDate.
displayConversionResult(referenceDate, sourceTimezoneId, targetTimezoneId);
} catch (error) {
console.error("Fehler bei der Zeitzonenberechnung:", error);
// Add more specific error message if Intl fails (e.g., invalid timezone ID)
if (error instanceof RangeError) {
alert(`Fehler: Eine der angegebenen Zeitzonen ('${sourceTimezoneId}' oder '${targetTimezoneId}') ist ungültig oder wird vom Browser nicht unterstützt.`);
} else {
alert("Ein unerwarteter Fehler bei der Berechnung der Zeit ist aufgetreten. Bitte überprüfe die Eingabe.");
}
}
});
// Display conversion result between source and target timezone
function displayConversionResult(referenceDate, sourceTimezoneId, targetTimezoneId) {
const container = document.getElementById('timezone-result');
container.innerHTML = '';
const sourceTzData = majorTimezones.find(tz => tz.id === sourceTimezoneId);
const targetTzData = majorTimezones.find(tz => tz.id === targetTimezoneId);
if (!sourceTzData || !targetTzData) {
console.error("Source or target timezone data not found in majorTimezones list.");
return;
}
// --- Funktion zum Erstellen einer Karte ---
function createResultCard(timezoneData, dateToFormat) {
const card = document.createElement('div');
card.className = 'timezone-card';
const timeFormatter = new Intl.DateTimeFormat('de-DE', { timeZone: timezoneData.id, hour: '2-digit', minute: '2-digit' });
const dateFormatter = new Intl.DateTimeFormat('de-DE', { timeZone: timezoneData.id, year: 'numeric', month: '2-digit', day: '2-digit' });
const timeStr = timeFormatter.format(dateToFormat);
const dateStr = dateFormatter.format(dateToFormat);
const offsetStr = getTimezoneOffsetString(dateToFormat, timezoneData.id);
card.innerHTML = `
<h3>${timezoneData.label}</h3>
<div class="time">${timeStr}</div>
<div class="date">${dateStr}</div>
<div class="timezone-offset">${offsetStr}</div>
`;
return card;
}
// Erstelle Quell- und Ziel-Karten
const sourceCard = createResultCard(sourceTzData, referenceDate);
const targetCard = createResultCard(targetTzData, referenceDate);
container.appendChild(sourceCard);
// Pfeil zwischen den Karten
const arrowContainer = document.createElement('div');
arrowContainer.className = 'timezone-card arrow-container';
arrowContainer.innerHTML = `<div class="conversion-arrow">→</div>`;
container.appendChild(arrowContainer);
container.appendChild(targetCard);
}
// Helper function to get timezone offset string (e.g., GMT+1)
function getTimezoneOffsetString(date, timezone) {
try {
// Nutze Intl.DateTimeFormat, um den Offset für das spezifische Datum und die Zeitzone zu erhalten
const formatter = new Intl.DateTimeFormat('en-US', {
timeZone: timezone,
timeZoneName: 'longOffset' // Gibt z.B. "GMT+01:00" zurück
});
// Formatiere das Datum, um den Offset-String zu extrahieren
const formattedParts = formatter.formatToParts(date);
const offsetPart = formattedParts.find(part => part.type === 'timeZoneName');
if (offsetPart) {
// Extrahiere den numerischen Teil (z.B. +1, -8)
const match = offsetPart.value.match(/GMT([-+]\d{1,2}(?::\d{2})?)/);
if (match && match[1]) {
// Vereinfache zu GMT+X oder GMT-X
const numericOffset = parseInt(match[1].split(':')[0], 10);
const sign = numericOffset >= 0 ? '+' : '-';
return `GMT${sign}${Math.abs(numericOffset)}`;
}
return offsetPart.value; // Fallback auf den vollen String
}
} catch (error) {
console.warn(`Konnte Offset für Zeitzone ${timezone} nicht ermitteln:`, error);
// Fallback: Verwende den Offset der lokalen Zeitzone des Browsers für dieses Datum
const localOffsetMinutes = date.getTimezoneOffset();
const offsetHours = -localOffsetMinutes / 60;
const sign = offsetHours >= 0 ? '+' : '-';
return `GMT${sign}${Math.abs(offsetHours)} (Lokal)`;
}
// Sicherer Fallback, falls alles fehlschlägt
return 'GMT?';
}
// Generate initial timezone cards
generateTimezoneCards();
</script>
</body>
</html>