Random Date Generator API: Generate Random Dates for Testing

Testing calendar features, booking systems, or report generators? The Random Date Generator API creates random dates within specified ranges, with support for multiple output formats, timezones, and date-only or datetime values.

Why Generate Random Dates?

Date handling is one of the trickiest parts of software development - timezones, formats, leap years, and edge cases make testing essential. Random date generation helps you test date pickers, scheduling logic, and time-based queries with realistic varied data.

Using a single hardcoded test date misses important edge cases like month boundaries, year transitions, and timezone handling.

Supported Date Formats

The API supports multiple output formats:

ISO 8601

Standard format: 2024-03-15T14:30:00Z

Unix Timestamp

Seconds or milliseconds since epoch

Localized Formats

US (MM/DD/YYYY), European (DD/MM/YYYY), and more

Custom Formats

Specify your own format string using standard tokens

Using the Random Date API

TinyFn provides a flexible endpoint to generate random dates:

GET https://api.tinyfn.io/v1/generate/date?start=2024-01-01&end=2024-12-31
Headers: X-API-Key: your-api-key

{
  "date": {
    "iso": "2024-07-23T00:00:00Z",
    "unix": 1721692800,
    "unix_ms": 1721692800000,
    "formatted": "July 23, 2024",
    "year": 2024,
    "month": 7,
    "day": 23,
    "day_of_week": "Tuesday"
  }
}

Parameters

Code Examples

JavaScript / Node.js

const response = await fetch(
  'https://api.tinyfn.io/v1/generate/date?start=2024-01-01&end=2024-12-31&include_time=true',
  { headers: { 'X-API-Key': 'your-api-key' } }
);
const { date } = await response.json();
console.log(`Date: ${date.iso}`);
console.log(`Day of week: ${date.day_of_week}`);

Python

import requests

response = requests.get(
    'https://api.tinyfn.io/v1/generate/date',
    headers={'X-API-Key': 'your-api-key'},
    params={
        'start': '2020-01-01',
        'end': '2024-12-31',
        'count': 10
    }
)
data = response.json()
for date in data['dates']:
    print(f"{date['formatted']} ({date['day_of_week']})")

cURL

curl "https://api.tinyfn.io/v1/generate/date?start=2024-01-01&end=2024-06-30" \
  -H "X-API-Key: your-api-key"

Common Use Cases

• Calendar Testing: Test date picker components with varied dates
• Booking Systems: Generate test reservation dates
• Report Generation: Test date-range filtered reports
• Database Seeding: Populate created_at and updated_at fields
• Age Verification: Test birthdate validation logic

Best Practices

1. Test edge cases: Include month boundaries, leap years, year transitions
2. Use appropriate ranges: Match date ranges to your application's domain
3. Test timezones: Verify date handling across different timezones
4. Generate in bulk: Create varied datasets for comprehensive testing
5. Include times when relevant: Test datetime handling, not just dates

Use via MCP

Your AI agent can call this tool directly via Model Context Protocol — no HTTP code needed. Add TinyFn to Claude Desktop, Cursor, or any MCP client:

{
  "mcpServers": {
    "tinyfn-generate": {
      "url": "https://api.tinyfn.io/mcp/generate/",
      "headers": {
        "X-API-Key": "your-api-key"
      }
    }
  }
}

See all generator tools available via MCP in our Generator MCP Tools for AI Agents guide.