Timezone Converter
Convert any date and time between timezones. See the time difference, current times in both zones, and swap zones with one click.
Converted Time
How Does Timezone Conversion Work?
Timezone conversion uses the browser's built-in Intl.DateTimeFormat API to accurately convert a given date and time from one timezone to another. This accounts for daylight saving time (DST) rules automatically, so conversions are always correct for the selected date.
Understanding UTC Offsets
Each timezone is defined by its offset from Coordinated Universal Time (UTC). For example, Eastern Standard Time (EST) is UTC-5, while Japan Standard Time (JST) is UTC+9. Some timezones shift by one hour during daylight saving time, and this tool handles those transitions automatically.
Common Timezone Abbreviations
- UTC — Coordinated Universal Time (the global reference)
- EST / EDT — Eastern Time (North America)
- CST / CDT — Central Time (North America)
- PST / PDT — Pacific Time (North America)
- GMT / BST — Greenwich Mean Time / British Summer Time
- CET / CEST — Central European Time
- JST — Japan Standard Time (UTC+9, no DST)
- IST — India Standard Time (UTC+5:30, no DST)
- AEST / AEDT — Australian Eastern Time
- CST (China) — China Standard Time (UTC+8, no DST)
Tips for Scheduling Across Timezones
When scheduling meetings or events across timezones, always double-check the converted time for the exact date, not just the offset. Daylight saving time changes can shift the difference between two zones by an hour depending on the time of year.