Timezone Converter
Convert a date and time across up to 5 timezones at once, with UTC offset and DST status.
About this tool
The Timezone Converter takes a single date and time in a source timezone and converts it into up to five target timezones simultaneously, showing each zone's UTC offset and whether daylight saving time is currently in effect. This is the tool for scheduling a meeting across distributed teams, debugging a "why did this cron job fire at the wrong time" issue, or converting a server log timestamp into a colleague's local time.
Pick a source timezone from a searchable list of all IANA timezones your browser supports, enter a date and time — or hit Now to pre-fill the current moment — and add target zones one at a time, up to five. Each result shows the converted local time, the UTC offset, and a DST indicator computed by comparing the zone's offset at your chosen date against its offset in January of the same year; if they differ, DST is active.
Unlike a simple "add N hours" calculator, this tool correctly handles the fact that UTC offsets change with daylight saving rules that differ by country and even by year. All computation uses the browser's native Intl.DateTimeFormat and the IANA timezone database your browser ships with — no external API call.