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API · /datetime-api

DateTime API

healthy 3,231 Subscribers

A fast, fully-local date and time toolkit (UTC): parse any date string or unix timestamp into ISO, unix and components with the ISO week number, day-of-year and leap-year flag; format dates with custom tokens (YYYY-MM-DD, weekday and month names, and more); add or subtract month-aware durations; compute the difference between two dates in every unit plus a human-readable summary; and convert between unix timestamps and ISO. Every endpoint accepts input via the query string or the request body. Pure server-side compute, no third-party upstream, so responses are instant and always available. Ideal for scheduling, billing periods, reminders, analytics and any date arithmetic. (For the current time in a specific timezone, see the oanor Time API.)

#datetime #date #timestamp #parse #format #duration #dev-tools
api.oanor.com/datetime-api
Get an API key Try in playground → Contact provider

Machine-readable spec so AI agents can integrate this API.

/api/datetime-api/openapi.json
/api/datetime-api/llms.txt

Discovery: GET /api/index.json lists every API.

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
165 ms
Server probes · 24h
Subscribers
3,231
active
Total calls
40
last 7 days
status Full status page → · 40 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 18,000 calls / month
  • 5 requests / second
  • Hard cap (429 above quota, no overage)
  • 18,000 requests/month, 5 req/s
  • All endpoints: parse, format, add/subtract, diff, convert
  • No credit card
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Basic

€4.00 /month

  • 260,000 calls / month
  • 15 requests / second
  • Hard cap (429 above quota, no overage)
  • 260,000 requests/month, 15 req/s
  • Full date-maths suite incl. ISO-week, day-of-year, leap-year
  • Commercial use allowed
  • Email support
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Pro

€13.00 /month

  • 1,700,000 calls / month
  • 40 requests / second
  • Hard cap (429 above quota, no overage)
  • 1,700,000 requests/month, 40 req/s
  • Month-aware add/subtract and full-unit diff
  • Priority email support
  • Commercial use allowed
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Mega

€35.00 /month

  • 9,000,000 calls / month
  • 120 requests / second
  • Hard cap (429 above quota, no overage)
  • 9,000,000 requests/month, 120 req/s
  • Highest throughput for bulk batch date processing
  • Deterministic UTC compute
  • Priority support
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Built by

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api.oanor.com/number-api

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Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for DateTime API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call DateTime API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for DateTime API?
Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.
How much does DateTime API cost?
DateTime API has a free tier with 100 calls / month. Paid plans start at €4.00 / month with higher quotas and faster rate limits.
Can I cancel my subscription anytime?
Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.
Is DateTime API GDPR-compliant?
All requests to DateTime API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.

Pick an endpoint from the list on the left to see its details and try it.

Code snippets

Sign up to get an API key, then call any path under your slug.

curl https://api.oanor.com/datetime-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/datetime-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/datetime-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);
import requests
r = requests.get(
    "https://api.oanor.com/datetime-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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