Fasting Day Endpoint

Get fasting rules and descriptions for a specific day.

Request

GET /fasting/day/{date}

Parameters:

Constraints: supported years 1583–3000.

Response

Returns fasting details including whether it is a fast day (isFasting), a type (FAST / NO_FAST / FAST_FREE), an explicit solid-week marker (isSolidWeek), a localized description, and an optional concrete meal rule (allowedFood).

FAST_FREE denotes "Solid Weeks" (Sviatki, Bright Week, etc.) where fasting is explicitly suspended, even on Wednesdays and Fridays. NO_FAST returns an explicit no-fast description (Поста нет / No fast) so API consumers do not receive a blank value for ordinary non-fasting days and feast-day exceptions. isSolidWeek is true only for solid weeks and false for all other days. allowedFood is returned only when a concrete food allowance exists for the day.

allowedFood values:

• ru: Пища без мяса, Рыба, горяч. пища с раст. маслом, Горяч. пища с раст. маслом, Горяч. пища без раст. масла, Сухоядение. Холод. пища без раст. масла, неподогретое питьё, Воздержание от пищи, разрешается икра
• en: meat-free food, fish, hot food with vegetable oil, hot food with vegetable oil, hot food without vegetable oil, cold food without vegetable oil, unheated drink, abstinence from food, caviar

{
  "meta": {
    "from": "2025-03-05",
    "to": "2025-03-05",
    "count": 1,
    "lang": "ru"
  },
  "data": {
    "2025-03-05": {
      "gregorianDate": "2025-03-05",
      "julianDate": "2025-02-20",
      "dayOfWeek": "Среда",
      "fasting": {
        "isFasting": true,
        "type": "FAST",
        "isSolidWeek": false,
        "description": "Великий пост",
        "allowedFood": "Сухоядение. Холод. пища без раст. масла, неподогретое питьё"
      }
    }
  }
}

Example (JavaScript)

const date = '2025-03-05';
fetch(`https://api.ispovednik.org/api/v1/fasting/day/${date}?lang=en`)
  .then(response => response.json())
  .then(data => console.log(data));