GMT (Greenwich Mean Time) is a time zone, while UTC (Coordinated Universal Time) is a time standard. For practical purposes, they are often used interchangeably, but UTC is more precise as it doesn't observe daylight saving time.
How does daylight saving time affect time zone conversions?
Daylight Saving Time (DST) adds one hour to standard time during summer months. When converting between time zones, you need to account for whether each location is currently observing DST. Some regions (like Arizona and Hawaii) don't observe DST at all.
What is the International Date Line?
The International Date Line is an imaginary line at approximately 180° longitude. Crossing it changes the calendar date by one day. When it's Monday in Tokyo, it's still Sunday in Hawaii.
How do I schedule meetings across multiple time zones?
Use our Meeting Planner tool to find overlapping business hours. Consider scheduling meetings during core business hours (9 AM - 5 PM) in the most restrictive time zone, or use a rotating schedule to share the inconvenience fairly.
What are the major time zones for business?
Key business time zones are: EST (New York), GMT (London), CET (Paris/Berlin), IST (Mumbai), CST (Shanghai), JST (Tokyo), and AEDT (Sydney). For global teams, GMT±3 hours often works well as a compromise.