Season Date Grounding Data

Overview

Weather Seasons works by calculating the dates of the solstice and equinox for a given year. It uses advanced algorithms to determine the dates of the solstice and equinox and returns the dates.

Live Test Season Date Grounding Data Source →

The tool

Once your client is connected to the VerveContext server, this appears in its tool list as SeasonDateGroundingData. It is read-only and open-world — it fetches and never mutates anything on your side — so most clients call it without asking you to confirm.

{
  "name": "SeasonDateGroundingData",
  "arguments": {}
}

Connecting

One server URL covers every source in the catalog, including this one. Authorization is OAuth: the client opens a browser once, and there is no key to paste into a config file.

{
  "mcpServers": {
    "vervecontext": {
      "url": "https://api.vervecontext.com/v1/mcp"
    }
  }
}

https://api.vervecontext.com/v1/mcp

Per-client setup — Claude, Cursor, VS Code, ChatGPT — is on the MCP setup page.

Arguments

These are the properties on the tool's inputSchema, so a well-behaved client validates them before the call is made. Premium arguments are accepted on every plan but only take effect on plans that include them.

What the model gets back

The result carries a structuredContent object matching the tool's declared outputSchema, so a client reads fields without parsing prose. status is "ok" and error is null on success; a null field means the value was not available for that input, not that the call failed.

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{
  "status": "ok",
  "error": null,
  "data": {
    "year": 2024,
    "timezone": "UTC",
    "march_equinox": "2024-03-20 03:06:24",
    "june_solstice": "2024-06-20 20:50:58",
    "september_equinox": "2024-09-22 12:43:55",
    "december_solstice": "2024-12-21 09:20:18"
  }
}

Response fields

Paths are relative to data. Premium fields are absent rather than zeroed on plans that do not include them, so check for presence instead of comparing to 0.

Why ground on it

A model can produce something that looks like this answer from its training data, and be confidently out of date or simply wrong. This source returns the current value in a shape you can check, which is the difference between an answer you can cite and one you have to hedge.

Point an evaluation at timezone: it is the field most worth pinning a claim to, and it is either present and current or absent — never plausibly invented.

Failure modes

Errors come back as tool errors carrying a sentence the model can act on, not a bare status code. Error handling covers the full list.

A call costs 2 credits each time the tool actually runs; a model that reasons about the tool without calling it costs nothing.

Use cases

Astronomical Calendar Events

Calendar apps populate official seasonal change markers across subscriber devices using exact equinox and solstice timestamps for upcoming years.

Agricultural Planting Schedules

To calculate frost risk windows and growing cycles, farming platforms align crop milestones with astronomical spring and fall equinox timings.

Seasonal Storefront Scheduling

Trigger seasonal storefront themes, banners, and promotional product categories automatically when astronomical solstice or equinox dates arrive.

Educational Planetarium Displays

Science museums query seasonal transition timestamps to synchronize interactive planetary orbit models with historical and future astronomical events.

Other ways to use Season Date Grounding Data

Set up Season Date Grounding Data on VerveContext, or reach the same source a different way. Your VerveContext account and credits work on all of them — one key, one balance.

Related

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