Does the converter account for daylight saving time?
The browser's IANA time-zone data is used, which normally applies date-specific daylight-saving rules.
Calculator Tools
Time Zone Converter Online Free
Convert time between 100+ countries, cities and time zones with searchable timezone selection.
From
🇮🇳 India
Asia/Kolkata
Jul 27, 2026, 1:40 PM
Converted Time
🇺🇸 United States - New York
America/New_York
Jul 27, 2026, 4:10 AM
Full Converted Time
Monday, July 27, 2026 at 4:10:00 AM EDT
Practical guide
About Time Zone Converter
Time-zone conversion is essential when meetings, deployments, support shifts, travel plans and deadlines involve people in different regions. City names or short abbreviations can be ambiguous, while daylight-saving rules change during the year. This tool uses IANA time-zone names and the browser's international date-time support to display a selected date and time in another zone. It is useful for planning, but users should still confirm how the source date-time is being interpreted and verify high-impact schedules such as flights, legal deadlines and production releases.
Formula or Calculation Logic
Time-zone conversion represents the same moment using the offset and daylight-saving rules of the selected target zone.
IANA names such as Asia/Kolkata and America/New_York are clearer than ambiguous abbreviations such as IST or CST.
Practical Example
Select a date and time
Choose a source and target IANA time zone
Compare the displayed local date and time in both locations
Common Uses
- ✓Scheduling international meetings and interviews
- ✓Planning software releases and maintenance windows
- ✓Coordinating customer support and operations shifts
- ✓Checking travel, webinar and event times
Common Mistakes
- ✓Using ambiguous abbreviations such as CST or IST
- ✓Forgetting daylight-saving changes
- ✓Assuming every country uses a whole-hour offset
- ✓Sharing a time without including the date and time-zone name
Good Practice
- ✓Use an IANA zone name or a well-known city
- ✓Include the date because offsets can change seasonally
- ✓Use UTC for technical logs and system integrations
- ✓Confirm critical travel and legal times with the official source
How to Use This Calculator
- 1Enter the date and time to review.
- 2Search for and select the source time zone.
- 3Search for and select the target time zone.
- 4Review the converted date and time, including any change of calendar day.
Privacy and Result Checking
The selected date, time and zone values are processed in your browser using built-in internationalisation support.
Important: Always verify flight schedules, legal deadlines and other critical timings with the responsible official service.
Frequently Asked Questions
Why should I use city or IANA zone names?
Short abbreviations can refer to more than one region. IANA names identify the intended zone more clearly.
Why can the converted date be different?
A time-zone offset can move the same moment to the previous or next calendar day in another location.
Should technical systems store local time?
Many systems store timestamps in UTC and convert them to local zones for display, which reduces ambiguity.