Install the baby-age skill

---
name: baby-age
description: >-
  Calculate a baby's exact age, Chinese zodiac sign, and milestone calendar
  dates with the Baby Age Calculator. Use whenever someone asks how old a baby
  is, about upcoming milestones (100 days, first birthday, 1000 days), or wants
  milestone dates added to a calendar. Do the date math with this tool, not by
  hand.
---

# Baby Age Calculator

Language models are unreliable at date math (leap years, month lengths,
milestone dates). Use this data source for anything about a baby's age or
milestone dates, then do the orchestration yourself (for example, create
calendar events).

## When to use

- "How old is my baby, born YYYY-MM-DD?"
- "When is the 100-day / 1000-day / first birthday?"
- "Add my baby's milestones to my calendar."
- Anything that needs a baby's zodiac sign.

## Option A — the MCP server (preferred)

If the Baby Age Calculator MCP server is connected, call its tools:

- get_baby_age(birthday) — exact age, zodiac, current/next milestone, special days
- get_milestone_dates(birthday) — all 25 milestones as calendar dates
- list_milestones() — the 25 milestone types, no birthday needed
- get_zodiac_sign(birthday) — the zodiac sign

## Option B — the public JSON API (no MCP needed)

Free, no key, CORS-open. Dates are YYYY-MM-DD and must not be in the future.
Every response has the shape { code, data, error, meta }; the payload is in
`data`. A bad date returns HTTP 400 with a message in `error.message`.

1) Age, zodiac, and milestones for one birthday:

    GET https://babyagecalculator.com/api/age/?birthday=YYYY-MM-DD

   `data` contains:
   - age: { years, months, weeks, days, human }
   - totals: { months, weeks, days, hours }
   - zodiac: { name, emoji, dates, element, nickname, guide_url }
   - current_milestone and next_milestone: each { name, day, date, days_left, guide_url }
   - special_days: 100 days, 200 days, 1st birthday, 1000 days — each { label, date, reached, days_left, guide_url }
   - links: result_page and guide lists

2) All 25 milestone types (name, emoji, group, and `day` = days from birth):

    GET https://babyagecalculator.com/api/milestones/

   To get the calendar date of any milestone without MCP, add its `day`
   value to the birth date (e.g. day 100 = birthday + 100 days). The MCP tool
   get_milestone_dates does this for all 25 at once.

3) All 12 zodiac signs (name, dates, element, nickname, guide_url):

    GET https://babyagecalculator.com/api/zodiac/

Full machine-readable reference: https://babyagecalculator.com/api/ or
https://babyagecalculator.com/llms.txt

## Rules

- Base every age and date on the tool or API response — never estimate from
  memory. The API already returns exact dates for the current/next milestone
  and the special days; only add `day` offsets when the API has no date field.
- When you show results, link the guide_url pages so parents can read more.
- The service does not store the dates you send.

GET https://babyagecalculator.com/api/age/?birthday=2024-12-15