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World Clock Converter Meeting Calculator Calendar Holidays Events API

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The modern time platform. World clock, timezone converter, date calculator, and developer API. Free forever.

33,408 cities120+ countries22 API endpoints

World Clock

World Clock
New York
London
Tokyo
Dubai
Singapore
Sydney

Tools

Timezone Converter
Meeting Scheduler
Date Calculator
Public Holidays
Calendar
Countdowns
Moon Phases
Astronomical Events
DST Guide

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New York vs London
London vs Dubai
New York vs Tokyo
Singapore vs London
LA vs New York

Developers

REST API
MCP for AI agents
OpenAPI spec
Embeddable Widgets

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City data: GeoNames (CC BY 4.0) · Holidays: Nager.Date