Time zone tool
Time Zone Converter
Input
Convert time between zones
?from=...&to=...&t=... plus from=local / to=local. Optional: &amb=earlier|later.Direct answer
This tool converts a selected date and time between IANA time zones and cities.
DST is applied automatically from timezone rules, so the selected date matters. When you share the URL, the same conversion state is preserved.
City, IANA timezone, or abbreviation?
I know the city
Use World Clock or a city page for searches like time in Chicago or London time now.
I know the IANA name
Use timezone pages for canonical names like America/Chicago or Europe/London.
I only know letters
Check abbreviations such as EST, CST, IST, or BST before using them in a conversion.
Common U.S. conversions
Avoid these mistakes
- Do not use fixed UTC offsets for future meetings: DST changes will break your math. Use the converter.
- EST and EDT are not always the same: EST is standard, EDT is daylight saving time. Specifying the wrong one in a calendar invite will shift your meeting by an hour.
- PST and PDT change with daylight saving: Similar to Eastern time, the Pacific coast switches offsets seasonally.
- IST is ambiguous: It can mean India Standard Time, Irish Standard Time, or Israel Standard Time depending on the context.
- City-based zones are safer: America/New_York will adjust for summer and winter automatically. Acronyms will not.
Best use cases
Schedule remote team meetings
Share an exact, auto-converting link in your Slack or Teams channel to avoid confusion.
Convert webinar times
Guarantee attendees across regions log in at the right moment without guessing.
Plan travel calls
Check exactly what time you should call family when traveling through international layovers.
Convert logs and timestamps
Compare UTC server event times to local incident reports accurately.
Compare business hours
Quickly verify if a remote office is still open before calling.
Frequently asked questions
Does this account for daylight saving time?
Yes. The converter applies all global DST rules automatically based on the specific date you select.
Why does the date matter?
Because daylight saving time starts and ends on different dates in different countries. A conversion for January might have a different offset than one in July.
Should I use EST or America/New_York?
Use America/New_York (or the city name). EST refers specifically to standard time. If you use EST during summer, your calculation will be off by an hour.
Can I share a converted time?
Yes. The URL automatically updates as you make changes. Copy and share the link, and the recipient will see the exact same conversion.
Why are timezone abbreviations confusing?
Acronyms are not globally unique. For instance, IST can refer to India, Ireland, or Israel. Using city names eliminates this ambiguity.
Continue with
Related tools
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Related guides
Understand Eastern standard vs daylight labels.
Avoid Pacific daylight-saving mistakes.
Know when the terms differ in practice.
Fix 10-digit vs 13-digit timestamp bugs.
Step-by-step overlap workflow for global teams.
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