Calculate year fraction 30 360 us

finance.year_fraction_30_360_us

ProductionEngine wrapper (Class A)Deterministicstrictinstantv1.0.0

No network

Overview

Calculate explicit year fraction 30 360 us from ordered ISO dates under an explicit closed profile, returning an auditable decimal receipt without hidden schedule, calendar, locale, or wall-clock state.

We provide pinned day-count arithmetic without hidden schedule assumptions.

Reliability

DAY_COUNT_INPUT_INVALID means dates, endpoint rule, or profile are unsupported.

Context footprint

The compact receipt replaces prompt date arithmetic. A successful call costs 1 execution credit.

When to use it

When both dates must follow US 30/360 month-end rules without an Actual numerator.

When you need Actual/360, Actual/365F, or European 30E/360 rather than US 30/360.

Scope

Note

Calculate explicit year fraction 30 360 us from ordered ISO dates under one explicit closed convention, returning a compact auditable receipt without schedule inference or hidden calendar state.

Non-goals

Does not infer a day-count profile.
Does not accept schedule-dependent Actual/Actual ICMA.

Properties

IdempotentRetry safeStreaming supportedFile input supportedRequires external service

Capabilities

math

Cost & billing

Flat rate per invocation

MetercallsBillable onsuccessCost per call1 credit

File handling

Accepts file_refProduces file_refMax input64 KB

How we handle your data

Sensitive input, safe output

What this means

This skill may receive sensitive content, but it does not target sensitive data and returns only a structured non-sensitive result.

Squillify guarantees

Runs inside Squillify
This skill runs inside Squillify.
Payloads are not sent to an external service by this skill.
Squillify does not permanently store submitted payloads.
Telemetry records metadata only, not submitted content.
Submitted payloads are not used for training.
Submitted payloads are not reviewed by humans.
This skill does not target sensitive data.
The response does not contain submitted content.

Your responsibility

Squillify does not determine whether submitted content is sensitive. Your application is responsible for deciding what data it is allowed to submit. Your application is responsible for securing the response.

Read the Microskill Data Handling Policy

Input schema

Field	Type	Required	Description
startDate	string	Yes	Required closed startDate field.
endDate	string	Yes	Required closed endDate field.

Output schema

Field	Type	Required	Description
yearFraction	string	Yes	Deterministic day-count output receipt field yearFraction.
syntheticDayCount	integer	Yes	Deterministic day-count output receipt field syntheticDayCount.

API contract

POST /v1/execute

curl

curl -sS -X POST "$BASE/v1/execute" -H "Authorization: Bearer $KEY" -H 'Content-Type: application/json' -d '{"skillKey":"finance.year_fraction_30_360_us","input":{"startDate":"2026-01-01","endDate":"2026-07-01"}}'

Integrations

TypeScript SDK

import { Squillify } from "@squillify/sdk";

const sq = new Squillify({ apiKey: process.env.SQUILLIFY_API_KEY });

const { output } = await sq.execute("finance.year_fraction_30_360_us", {"startDate":"2026-01-01","endDate":"2026-07-01"});

Errors

Code	HTTP	Retryable	Description
VALIDATION_ERROR	400	No	The request payload failed schema validation.
UNAUTHORIZED	401	No	Missing or invalid API key.
SKILL_NOT_ACCESSIBLE	403	No	The API key is not granted access to this skill.
SKILL_NOT_AVAILABLE_FOR_PLAN	403	No	This skill is not included in your current plan.
PLAN_ELIGIBILITY_UNAVAILABLE	503	Yes	Plan eligibility could not be decided. Retry after backoff.
SKILL_NOT_FOUND	404	No	The requested skill or version does not exist.
TENANT_RATE_LIMITED	429	Yes	Request rate limit exceeded. Retry after backoff.
QUOTA_EXCEEDED	429	Yes	Plan quota exhausted. Retryable once the quota period resets.
EXECUTION_TIMEOUT	504	Yes	Execution exceeded the allowed time budget.
DAY_COUNT_INPUT_INVALID	400	No	The request payload failed this skill's input validation.

Other limits

Limit	Value
Recommended inline bytes	32 KiB

Limitations

Does not infer a day-count profile.
Does not accept schedule-dependent Actual/Actual ICMA.
Schedule-dependent or inferred conventions.

How to call

POST /v1/execute (requires authentication)

Request bodyjson

{
  "skillKey": "finance.year_fraction_30_360_us",
  "input": {
    "startDate": "2026-01-01",
    "endDate": "2026-07-01"
  }
}

Examples

Verified vector

Inputjson

{
  "startDate": "2026-01-01",
  "endDate": "2026-07-01"
}

Expected outputjson

{
  "yearFraction": "0.5",
  "syntheticDayCount": 180
}

Tip

Independent W18 vector.

Repeated vector