Time Zone Converter
Convert time between different time zones around the world.
Popular Time Zones
📘 How It Works
Time Zone Offset Definition
Each time zone is defined by its UTC offset (e.g., EST = UTC-5, IST = UTC+5:30). The offset represents hours (and sometimes half-hours) ahead of or behind Coordinated Universal Time (UTC).
Convert to UTC First
The source time is first converted to UTC by subtracting the source timezone's offset: UTC_time = source_time - source_offset. This gives us a universal reference point independent of any timezone.
Apply Target Offset
The UTC time is then converted to the target timezone by adding the target offset: target_time = UTC_time + target_offset. This two-step process ensures accurate conversion between any two timezones.
Date Boundary Handling
When the conversion crosses midnight, the algorithm adjusts the date accordingly. Hours greater than 23 roll to the next day; negative hours roll to the previous day. This handles international date line crossings.
Offset Difference Display
The calculator shows the total hour difference between zones (target_offset - source_offset). This helps you understand the time gap for scheduling recurring meetings or calls.
💡 Common Use Cases
Remote Team Scheduling
Coordinate meeting times across global teams. Find times that work for New York, London, and Tokyo offices without anyone joining at midnight.
International Client Calls
Schedule calls with clients in different timezones. Convert your proposed time to their local time to suggest appropriate meeting hours.
Flight Arrival Planning
Calculate what local time you'll arrive at your destination. Plan airport pickups and hotel check-ins based on destination local time.
Live Event Broadcasting
Determine when a live sports event, concert, or conference will air in your timezone. Convert broadcast times for global viewership.
Stock Market Hours
Track when international stock exchanges open and close in your local time. Essential for traders monitoring NYSE, LSE, TSE, and other markets.
Customer Support Coverage
Plan support team schedules to provide coverage during customer business hours. Ensure 24/7 support across global regions.