# Moon Phase Calendar (`mangudai/moon-phase-calendar`) Actor Generate a moon phase calendar for any date range. Each day gets the phase name, an emoji, illumination percent, moon age and a flag for the exact new moon, quarter and full moon dates. Computed offline from astronomical formulas, so no API key and nothing to break. - **URL**: https://apify.com/mangudai/moon-phase-calendar.md - **Developed by:** [MangudΓ€i](https://apify.com/mangudai) (community) - **Categories:** Open source, Other, Developer tools - **Stats:** 2 total users, 1 monthly users, 100.0% runs succeeded, 0 bookmarks - **User rating**: No ratings yet ## Pricing from $0.01 / 1,000 results This Actor is paid per event. You are not charged for the Apify platform usage, but only a fixed price for specific events. Learn more: https://docs.apify.com/platform/actors/running/actors-in-store#pay-per-event ## What's an Apify Actor? Actors are a software tools running on the Apify platform, for all kinds of web data extraction and automation use cases. In Batch mode, an Actor accepts a well-defined JSON input, performs an action which can take anything from a few seconds to a few hours, and optionally produces a well-defined JSON output, datasets with results, or files in key-value store. In Standby mode, an Actor provides a web server which can be used as a website, API, or an MCP server. Actors are written with capital "A". ## How to integrate an Actor? If asked about integration, you help developers integrate Actors into their projects. You adapt to their stack and deliver integrations that are safe, well-documented, and production-ready. The best way to integrate Actors is as follows. In JavaScript/TypeScript projects, use official [JavaScript/TypeScript client](https://docs.apify.com/api/client/js.md): ```bash npm install apify-client ``` In Python projects, use official [Python client library](https://docs.apify.com/api/client/python.md): ```bash pip install apify-client ``` In shell scripts, use [Apify CLI](https://docs.apify.com/cli/docs.md): ````bash # MacOS / Linux curl -fsSL https://apify.com/install-cli.sh | bash # Windows irm https://apify.com/install-cli.ps1 | iex ```bash In AI frameworks, you might use the [Apify MCP server](https://docs.apify.com/platform/integrations/mcp.md). If your project is in a different language, use the [REST API](https://docs.apify.com/api/v2.md). For usage examples, see the [API](#api) section below. For more details, see Apify documentation as [Markdown index](https://docs.apify.com/llms.txt) and [Markdown full-text](https://docs.apify.com/llms-full.txt). # README ## Moon Phase Calendar Generate a moon phase calendar for any date range. Give it a start date and a number of days, and it returns one row per day with the phase name, an emoji, illumination percent, moon age, and a flag for the exact day of each new moon, first quarter, full moon and last quarter. Everything is computed offline from astronomical formulas. There is no API key, no account, no rate limit, and nothing to break. Point it at 1868 or 2140 and it still works. ### What you get Each day in the range produces one dataset record: | Field | Meaning | | --- | --- | | `date` | The UTC day, `YYYY-MM-DD`. | | `phaseName` | One of the eight phases, from New Moon to Waning Crescent. | | `phaseEmoji` | The matching moon emoji, oriented for your hemisphere. | | `illuminationPercent` | Share of the disc lit by the Sun, 0 to 100. | | `moonAgeDays` | Days elapsed since the last new moon. | | `phaseAngleDeg` | Moon minus Sun ecliptic longitude, 0 to 360. | | `isWaxing` | `true` while the Moon is filling, `false` while it wanes. | | `isPrincipalPhase` | `true` on the exact day a principal phase occurs. | | `principalPhaseName` | The principal phase name on that day, otherwise empty. | ### Input - **Start date**: first day of the calendar in UTC (`YYYY-MM-DD`). Leave it empty to start today. - **Number of days**: how many days to compute, 1 to 366. Defaults to 30. - **Hemisphere**: Northern or Southern. This only flips the emoji, since the lit side looks mirrored below the equator. The numbers are the same everywhere. ### Example output ```json { "date": "2026-03-03", "phaseName": "Full Moon", "phaseEmoji": "πŸŒ•", "illuminationPercent": 100.0, "moonAgeDays": 14.8, "phaseAngleDeg": 180.0, "isWaxing": false, "isPrincipalPhase": true, "principalPhaseName": "Full Moon" } ```` ### How it works The actor computes the geocentric ecliptic longitude of the Sun and the Moon with truncated series from Jean Meeus, *Astronomical Algorithms*. The phase follows from their elongation: illumination is `(1 - cos elongation) / 2`, and moon age scales with the mean synodic month of 29.53 days. Principal phases are pinned to the day their exact instant falls within, in UTC. Accuracy is well under a degree, so phase names, illumination and the dates of new and full moons line up with published lunar calendars. ### Uses - Fill a calendar or almanac app with lunar data. - Plan night photography, camping, fishing or stargazing around dark skies and full moons. - Feed moon phases into gardening, tide or wildlife models. - Add a lunar column to an astrology or wellness product. ### Notes Times are UTC. A principal phase that happens just after midnight UTC can land on the previous calendar day in your local zone, which is normal for any lunar calendar. Rise and set times depend on your exact location and are out of scope here; this actor is about the phase itself, which is effectively the same for everyone on Earth at a given moment. # Actor input Schema ## `startDate` (type: `string`): First day of the calendar in UTC, format YYYY-MM-DD. Leave empty to start from today. ## `days` (type: `integer`): How many consecutive days to compute, counting from the start date. ## `hemisphere` (type: `string`): Sets the orientation of the phase emoji. The lit side looks mirrored from the southern hemisphere. Illumination and phase name are the same worldwide. ## Actor input object example ```json { "startDate": "2026-01-01", "days": 30, "hemisphere": "Northern" } ``` # Actor output Schema ## `moonPhases` (type: `string`): One row per day with phase name, emoji, illumination percent, moon age and principal-phase flags, stored in the default dataset. # API You can run this Actor programmatically using our API. Below are code examples in JavaScript, Python, and CLI, as well as the OpenAPI specification and MCP server setup. ## JavaScript example ```javascript import { ApifyClient } from 'apify-client'; // Initialize the ApifyClient with your Apify API token // Replace the '' with your token const client = new ApifyClient({ token: '', }); // Prepare Actor input const input = {}; // Run the Actor and wait for it to finish const run = await client.actor("mangudai/moon-phase-calendar").call(input); // Fetch and print Actor results from the run's dataset (if any) console.log('Results from dataset'); console.log(`πŸ’Ύ Check your data here: https://console.apify.com/storage/datasets/${run.defaultDatasetId}`); const { items } = await client.dataset(run.defaultDatasetId).listItems(); items.forEach((item) => { console.dir(item); }); // πŸ“š Want to learn more πŸ“–? Go to β†’ https://docs.apify.com/api/client/js/docs ``` ## Python example ```python from apify_client import ApifyClient # Initialize the ApifyClient with your Apify API token # Replace '' with your token. client = ApifyClient("") # Prepare the Actor input run_input = {} # Run the Actor and wait for it to finish run = client.actor("mangudai/moon-phase-calendar").call(run_input=run_input) # Fetch and print Actor results from the run's dataset (if there are any) print("πŸ’Ύ Check your data here: https://console.apify.com/storage/datasets/" + run["defaultDatasetId"]) for item in client.dataset(run["defaultDatasetId"]).iterate_items(): print(item) # πŸ“š Want to learn more πŸ“–? Go to β†’ https://docs.apify.com/api/client/python/docs/quick-start ``` ## CLI example ```bash echo '{}' | apify call mangudai/moon-phase-calendar --silent --output-dataset ``` ## MCP server setup ```json { "mcpServers": { "apify": { "command": "npx", "args": [ "mcp-remote", "https://mcp.apify.com/?tools=mangudai/moon-phase-calendar", "--header", "Authorization: Bearer " ] } } } ``` ## OpenAPI specification ```json { "openapi": "3.0.1", "info": { "title": "Moon Phase Calendar", "description": "Generate a moon phase calendar for any date range. Each day gets the phase name, an emoji, illumination percent, moon age and a flag for the exact new moon, quarter and full moon dates. Computed offline from astronomical formulas, so no API key and nothing to break.", "version": "0.0", "x-build-id": "GSmUbWDBqsLLrnrcu" }, "servers": [ { "url": "https://api.apify.com/v2" } ], "paths": { "/acts/mangudai~moon-phase-calendar/run-sync-get-dataset-items": { "post": { "operationId": "run-sync-get-dataset-items-mangudai-moon-phase-calendar", "x-openai-isConsequential": false, "summary": "Executes an Actor, waits for its completion, and returns Actor's dataset items in response.", "tags": [ "Run Actor" ], "requestBody": { "required": true, "content": { "application/json": { "schema": { "$ref": "#/components/schemas/inputSchema" } } } }, "parameters": [ { "name": "token", "in": "query", "required": true, "schema": { "type": "string" }, "description": "Enter your Apify token here" } ], "responses": { "200": { "description": "OK" } } } }, "/acts/mangudai~moon-phase-calendar/runs": { "post": { "operationId": "runs-sync-mangudai-moon-phase-calendar", "x-openai-isConsequential": false, "summary": "Executes an Actor and returns information about the initiated run in response.", "tags": [ "Run Actor" ], "requestBody": { "required": true, "content": { "application/json": { "schema": { "$ref": "#/components/schemas/inputSchema" } } } }, "parameters": [ { "name": "token", "in": "query", "required": true, "schema": { "type": "string" }, "description": "Enter your Apify token here" } ], "responses": { "200": { "description": "OK", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/runsResponseSchema" } } } } } } }, "/acts/mangudai~moon-phase-calendar/run-sync": { "post": { "operationId": "run-sync-mangudai-moon-phase-calendar", "x-openai-isConsequential": false, "summary": "Executes an Actor, waits for completion, and returns the OUTPUT from Key-value store in response.", "tags": [ "Run Actor" ], "requestBody": { "required": true, "content": { "application/json": { "schema": { "$ref": "#/components/schemas/inputSchema" } } } }, "parameters": [ { "name": "token", "in": "query", "required": true, "schema": { "type": "string" }, "description": "Enter your Apify token here" } ], "responses": { "200": { "description": "OK" } } } } }, "components": { "schemas": { "inputSchema": { "type": "object", "properties": { "startDate": { "title": "Start date", "type": "string", "description": "First day of the calendar in UTC, format YYYY-MM-DD. Leave empty to start from today." }, "days": { "title": "Number of days", "minimum": 1, "maximum": 366, "type": "integer", "description": "How many consecutive days to compute, counting from the start date.", "default": 30 }, "hemisphere": { "title": "Hemisphere", "enum": [ "Northern", "Southern" ], "type": "string", "description": "Sets the orientation of the phase emoji. The lit side looks mirrored from the southern hemisphere. Illumination and phase name are the same worldwide.", "default": "Northern" } } }, "runsResponseSchema": { "type": "object", "properties": { "data": { "type": "object", "properties": { "id": { "type": "string" }, "actId": { "type": "string" }, "userId": { "type": "string" }, "startedAt": { "type": "string", "format": "date-time", "example": "2025-01-08T00:00:00.000Z" }, "finishedAt": { "type": "string", "format": "date-time", "example": "2025-01-08T00:00:00.000Z" }, "status": { "type": "string", "example": "READY" }, "meta": { "type": "object", "properties": { "origin": { "type": "string", "example": "API" }, "userAgent": { "type": "string" } } }, "stats": { "type": "object", "properties": { "inputBodyLen": { "type": "integer", "example": 2000 }, "rebootCount": { "type": "integer", "example": 0 }, "restartCount": { "type": "integer", "example": 0 }, "resurrectCount": { "type": "integer", "example": 0 }, "computeUnits": { "type": "integer", "example": 0 } } }, "options": { "type": "object", "properties": { "build": { "type": "string", "example": "latest" }, "timeoutSecs": { "type": "integer", "example": 300 }, "memoryMbytes": { "type": "integer", "example": 1024 }, "diskMbytes": { "type": "integer", "example": 2048 } } }, "buildId": { "type": "string" }, "defaultKeyValueStoreId": { "type": "string" }, "defaultDatasetId": { "type": "string" }, "defaultRequestQueueId": { "type": "string" }, "buildNumber": { "type": "string", "example": "1.0.0" }, "containerUrl": { "type": "string" }, "usage": { "type": "object", "properties": { "ACTOR_COMPUTE_UNITS": { "type": "integer", "example": 0 }, "DATASET_READS": { "type": "integer", "example": 0 }, "DATASET_WRITES": { "type": "integer", "example": 0 }, "KEY_VALUE_STORE_READS": { "type": "integer", "example": 0 }, "KEY_VALUE_STORE_WRITES": { "type": "integer", "example": 1 }, "KEY_VALUE_STORE_LISTS": { "type": "integer", "example": 0 }, "REQUEST_QUEUE_READS": { "type": "integer", "example": 0 }, "REQUEST_QUEUE_WRITES": { "type": "integer", "example": 0 }, "DATA_TRANSFER_INTERNAL_GBYTES": { "type": "integer", "example": 0 }, "DATA_TRANSFER_EXTERNAL_GBYTES": { "type": "integer", "example": 0 }, "PROXY_RESIDENTIAL_TRANSFER_GBYTES": { "type": "integer", "example": 0 }, "PROXY_SERPS": { "type": "integer", "example": 0 } } }, "usageTotalUsd": { "type": "number", "example": 0.00005 }, "usageUsd": { "type": "object", "properties": { "ACTOR_COMPUTE_UNITS": { "type": "integer", "example": 0 }, "DATASET_READS": { "type": "integer", "example": 0 }, "DATASET_WRITES": { "type": "integer", "example": 0 }, "KEY_VALUE_STORE_READS": { "type": "integer", "example": 0 }, "KEY_VALUE_STORE_WRITES": { "type": "number", "example": 0.00005 }, "KEY_VALUE_STORE_LISTS": { "type": "integer", "example": 0 }, "REQUEST_QUEUE_READS": { "type": "integer", "example": 0 }, "REQUEST_QUEUE_WRITES": { "type": "integer", "example": 0 }, "DATA_TRANSFER_INTERNAL_GBYTES": { "type": "integer", "example": 0 }, "DATA_TRANSFER_EXTERNAL_GBYTES": { "type": "integer", "example": 0 }, "PROXY_RESIDENTIAL_TRANSFER_GBYTES": { "type": "integer", "example": 0 }, "PROXY_SERPS": { "type": "integer", "example": 0 } } } } } } } } } } ```