What is Timezone Converter?
Ultitools Timezone Converter & Global Meeting Planner allows you to compare and convert dates and times across global timezones with daylight saving time support, visual 24-hour timeline, and copyable meeting schedules.
How to Use Timezone Converter in 3 Simple Steps
No software installation, registration, or cloud file upload required.
Set Base Date & Time
Select your local date and time or click Now to use your current system time.
Add Target Cities / Zones
Add world timezones like New York, London, Paris, Tokyo, Mumbai, Sydney, or UTC.
Copy Meeting Invitation
Review business working hours badges and copy a formatted multi-timezone schedule.
Technical Specifications & Quality Architecture
Machine-readable specifications verified under our Studio Master Quality Standard.
| Specification Property | Engine Configuration / Standard |
|---|---|
| Timezone Database | Native ECMAScript Intl & IANA Time Zone Database |
| Time Formats | 12-Hour AM/PM, 24-Hour Military, ISO 8601 UTC |
| Visual Timeline | Interactive 24-Hour Slider with Business Hours Status |
| Privacy | 100% In-Browser |
| Studio Developer | Aug27 Studio |
Frequently Asked Questions
Clear, direct answers regarding privacy, performance, and features.
Yes. The converter uses native IANA timezone databases with accurate historical and future DST shifts.
Green indicates standard business hours (9 AM - 5 PM), yellow indicates early morning/evening (7-9 AM or 5-10 PM), and dark indicates sleep hours (10 PM - 7 AM).
Yes. Click "Copy Meeting Invitation" to get a clean text summary formatted for all attendee time zones.