World Time & Chronometry API Docs (v1)
Free, low-latency REST API documentation for live world time, IANA timezones, UTC offsets, and solar ephemeris calculations. Zero keys required.
Test rate limits and authentication tiers in real-time.
Current Atomic UTC Time & Timestamps
Returns the current international atomic time standard (UTC), ISO 8601 string, UNIX timestamps (seconds and milliseconds), day of year, week number, and leap year flags.
Example Response Schema
Content-Type: application/json{
"status": "success",
"data": {
"standard": "Coordinated Universal Time (UTC)",
"iso8601": "2026-10-08T16:30:00.000Z",
"timestamp": 1791477000,
"timestampMs": 1791477000000,
"year": 2026,
"month": 10,
"day": 8,
"hours": 16,
"minutes": 30,
"seconds": 0,
"dayOfWeek": "Thursday",
"dayOfYear": 281,
"weekNumber": 41,
"isLeapYear": false,
"utcOffset": "+00:00",
"abbreviation": "UTC"
},
"rateLimit": {
"tier": "free",
"tierName": "Free Starter",
"limitPerMinute": 10,
"remainingThisMinute": 9,
"resetSeconds": 60
}
}High-Throughput Time Infrastructure for Modern Teams
Scale seamlessly from local development to mission-critical enterprise microservices with guaranteed SLAs and accurate IANA timezone datasets.
Free Starter
Perfect for development, personal scripts, and prototype validation.
- 3,000 requests per month
- 10 requests per minute
- UTC, timezones & location endpoints
- Community documentation & samples
- No credit card required
Developer Pro
Designed for production mobile apps, SaaS integrations, and cron jobs.
- 50,000 requests per month
- 60 requests per minute (1 req/sec burst)
- Solar, astronomical & moon phase endpoints
- Timezone conversion & meeting overlap matrix
- Email developer support within 24h
- Commercial production license
Business Scale
High-throughput infrastructure for multinational enterprise scheduling & logistics.
- 500,000 requests per month
- 300 requests per minute burst capacity
- 99.9% Uptime SLA guarantee
- Multi-city parallel batch calculation
- Dedicated edge caching & zero-latency routes
- Priority horology engineering escalation
Enterprise Custom
Custom contract, bespoke quotas, on-premises docker containers, or dedicated cloud routing.
- 5,000,000+ requests per month
- Custom rate limits & dedicated IPs
- 99.99% Enterprise SLA
- Dedicated account manager
- Custom timezone data ingestion
- Invoiced payment & signed DPA
Endpoints for City Time, Timezones, and Coordinates
Integrate live atomic timestamps, municipal local clocks, and solar calculations into your applications. The TimeNumbers REST API provides high-throughput, edge-cached endpoints powered by canonical IANA tzdata.
Review complete request and response schemas, test live queries with our interactive playground, and integrate world time directly into web apps, CLI utilities, and IoT hardware.
Astronomical and Solar Ephemeris Payloads
Canonical IANA tzdata, astronomical ephemeris formulas, and edge CDN cache headers.
Rate Limiting, CORS Headers, and Edge Caching
Canonical IANA tzdata, astronomical ephemeris formulas, and edge CDN cache headers.
Frequently Asked Questions: REST API Integration
Common queries, time calculations, and scientific explanations
Explore More Developer Tools & Clocks
Quick access to international capitals, timezone offsets, chronometry tools, and horology guides