Julian Day Calculator

Julian Day Calculator API

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Julian Day Calculator converts between Gregorian calendar dates and Julian Day Numbers (JDN). Julian Day is a continuous count of days used in astronomy and historical research.

Online
1 credit/call
99.9% uptime
Docs
avg: 193ms|p50: 186ms|p75: 198ms|p90: 212ms|p99: 239ms
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Online
1 credit/call
99.9% uptime
Docs
avg: 193ms|p50: 186ms|p90: 212ms|p99: 239ms

Live Test API

Try out the Julian Day Calculator with a live request and see the response in real-time.

API Request

GET
https://api.apiverve.com
Parameters

API Response

200 OK
12345678910
{
  "status": "ok",
  "error": null,
  "data": {
    "gregorian": "2024-03-15",
    "julianDayNumber": 2460385,
    "modifiedJulianDate": 60384.5,
    "dayOfWeek": "Friday"
  }
}

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NuGet

.NET / C#
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Python
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NPM

Node.js / JavaScript
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NPMDocs
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Frequently Asked Questions

Get answers to common questions about the Julian Day Calculator API

What does the Julian Day Calculator API do?

Julian Day Calculator converts between Gregorian calendar dates and Julian Day Numbers (JDN). Julian Day is a continuous count of days used in astronomy and historical research. The API returns structured data in JSON, XML, or YAML format, making it easy to integrate into any application or workflow.

How fast is the Julian Day Calculator API?

The Julian Day Calculator API has an average response time of 193ms, with a median (p50) of 186ms and 99th percentile of 239ms. Our infrastructure maintains 99.9% uptime with servers distributed globally for low latency.

How much does the Julian Day Calculator API cost?

Each call to the Julian Day Calculator API uses 1 credit. The free tier includes 100 credits per month. Paid plans start at $29.99/month with higher limits, and enterprise plans offer custom pricing with priority support.

How do I authenticate Julian Day Calculator API requests?

Include your API key in the request header as X-API-Key: your_key_here. All requests are made over HTTPS for security. You can get your API key by signing up for a free account.

What HTTP methods does Julian Day Calculator support?

The Julian Day Calculator API supports GET requests. Simply pass your parameters as query strings in the URL. Check our documentation for detailed parameter specifications.

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