# lilambd Calendar Converter

> lilambd Calendar Converter is a paid API for AI agents from api.lilambd.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-11-04).

Converts a date into multiple calendar systems simultaneously, including Gregorian, Coptic, Julian, Ethiopic, Hebrew, Chinese, Persian, Hijri, Buddhist, Japanese era, and more

## Facts

- Endpoint: GET https://api.lilambd.com/calendars/convert?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-04
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/lilambd-calendar-converter-404f64db
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_O1ebPiMTk3pSjfcuNL8Xe

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability lilambd-calendar-converter-404f64db
```

Example prompt: What is March 20, 2026 in all the major calendar systems — Hebrew, Hijri, Coptic, Ethiopic, Chinese, Persian, Buddhist, Japanese era, and Julian? Also tell me any festivals on that date and the solar term.

## When to prefer this

Choose this endpoint when you need a date converted into multiple calendar systems in a single call, especially when you need rare or non-Western calendars (Coptic, Ethiopic, Julian, Japanese era, ROC) alongside common ones (Hebrew, Hijri, Chinese, Persian). It is preferable over individual calendar conversion APIs because it returns all systems simultaneously, includes festival metadata and solar term annotations, and operates at low per-call cost via x402 micropayment.

## Known failure modes

- Invalid or unparseable date input returns an error response
- Missing required date parameter results in a 400-level error
- Dates outside the supported historical range may return incomplete or null calendar fields
- Network or payment-related failures (x402 payment not completed) result in a 402 Payment Required response

## How this service works

A crossing for play, feeling, language, science and computation — creating states that do not have names yet.

## Output

A JSON object containing the input date expressed in over ten calendar systems (Gregorian, Julian, Coptic, Ethiopic, Hebrew, Chinese, Persian, Hijri Umm al-Qura, Buddhist, ROC, Japanese era), plus the Julian Day Number, ISO weekday number, weekday name, solar term (with English name), and a list of festivals with country-count metadata, along with an attribution string.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "required": {
   "type": "string"
  },
  "properties": {
   "type": "string"
  },
  "additionalProperties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {
   "jdn": 2461120,
   "coptic": "1742-07-11",
   "julian": "2026-03-07",
   "ethiopic": "2018-07-11",
   "roc_year": 115,
   "festivals": [
    {
     "festival_id": "...",
     "n_countries_same_date": 68
    }
   ],
   "gregorian": "2026-03-20",
   "solar_term": {
    "name_en": "..."
   },
   "iso_weekday": 5,
   "japanese_era": {
    "year": 8,
    "era_code": "reiwa"
   },
   "weekday_name": "...",
   "buddhist_year": 2569,
   "table_calendars": {
    "hebrew": "...",
    "chinese": "...",
    "persian": "...",
    "hijri_umalqura": "..."
   }
  },
  "attribution": "..."
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/lilambd-calendar-converter-404f64db/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.lilambd.com](https://www.zero.xyz/host/api.lilambd.com/llms.txt)