Business Days Between

time.business_days_between

ProductionBounded custom (Class B)Deterministicstrictinstantv1.0.0

No network

Overview

Counts business days between two ISO local dates. The weekend is whatever the caller declares (Saturday and Sunday by default, or any set from none to six days) and holidays are supplied explicitly as a list of dates — no national calendar is bundled, so an empty holidays array means weekends only. Inclusivity is explicit: 'start' (default) counts a half-open range, and 'both', 'end', and 'neither' are also available. A reversed range returns a negative count rather than an error. Holidays falling on a weekend are never counted twice.

Working-day counting depends on conventions you must declare — we make weekend days, holidays, inclusivity, and reversed ranges explicit instead of assumed.

Reliability

Same dates, same rules, same count — we read no clock, no locale and no zone data, and we bundle no national holidays, so a working calendar is only ever what you send. A holiday listed twice, or listed on a weekend day, affects the result exactly once, or not at all. Whole weeks are computed arithmetically, so a hundred-year span costs the same as a two-week one. DATE_SPAN_TOO_LARGE — trigger: startDate and endDate are more than 36500 days apart, about a century, in either direction; retryable: no, the same pair always fails; next: check for a typo in the year, or split the span into shorter windows and add the counts. WEEKEND_DEFINITION_INVALID — trigger: weekendDays names all seven days, which leaves no working day to count; retryable: no; next: leave at least one day out of the weekend list, or send an empty array if every day is a working day.

Context footprint

One call replaces a day-by-day loop an agent would otherwise simulate token by token, and returns six scalar fields. A successful call costs 1 execution credit.

When to use it

When you measure an SLA, payment term, or project duration in working days and you supply the calendar rules.

Do not use for calendar-day differences, hour-level scheduling, or when you need the platform to know a country's public holidays.

Scope

Note

Counts business days between two local dates under a caller-declared weekend definition and an explicit holiday list.

Non-goals

Does not bundle national or regional holiday calendars — holidays are supplied
Does not do partial-day or working-hour arithmetic
Does not handle time zones; both dates are plain local dates
Does not apply month-end or quarter-end financial conventions
Does not read the system clock

Properties

IdempotentRetry safeStreaming supportedFile input supportedRequires external service

Capabilities

analysismath

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	First named local date.
endDate	string	Yes	Second named local date.
weekendDays	array	No	From 0 through 7 excluded weekdays; omit it for Saturday and Sunday.
holidays	array	No	From 0 through the published holiday cap of explicit non-working dates; omit it for none.
inclusive	string	No	Endpoint-counting rule; omit it for start.

Output schema

Field	Type	Required	Description
businessDays	integer	Yes	Signed working-day count.
calendarDays	integer	Yes	Unsigned counted calendar days.
weekendDaysInSpan	integer	Yes	Counted weekend days.
holidayDays	integer	Yes	Counted non-weekend holidays.
inclusive	string	Yes	Applied endpoint rule.
reversed	boolean	Yes	Whether end precedes start.

API contract

POST /v1/execute

curl

curl -sS -X POST "$BASE/v1/execute" -H "Authorization: Bearer $KEY" -H 'Content-Type: application/json' -d '{"skillKey":"time.business_days_between","input":{"startDate":"2026-03-02","endDate":"2026-03-13","holidays":["2026-03-05"]}}'

Integrations

TypeScript SDK

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

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

const { output } = await sq.execute("time.business_days_between", {"holidays":["2026-03-05"],"startDate":"2026-03-02","endDate":"2026-03-13"});

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.
DATE_SPAN_TOO_LARGE	429	No	A size, quota, rate, or time limit was exceeded.
WEEKEND_DEFINITION_INVALID	400	No	The request payload failed this skill's input validation.

Other limits

Limit	Value
Recommended inline bytes	32 KiB

Limitations

Does not bundle national or regional holiday calendars — holidays are supplied
Does not do partial-day or working-hour arithmetic
Does not handle time zones; both dates are plain local dates
Does not apply month-end or quarter-end financial conventions
Does not read the system clock
Counting calendar days (plain date subtraction does that)
Anything that needs a built-in public-holiday calendar
Hour-level or shift-level working-time calculations

How to call

POST /v1/execute (requires authentication)

Request bodyjson

{
  "skillKey": "time.business_days_between",
  "input": {
    "holidays": [
      "2026-03-05"
    ],
    "startDate": "2026-03-02",
    "endDate": "2026-03-13"
  }
}

Examples

Count working days across a holiday

Inputjson

{
  "holidays": [
    "2026-03-05"
  ],
  "startDate": "2026-03-02",
  "endDate": "2026-03-13"
}

Expected outputjson

{
  "inclusive": "start",
  "calendarDays": 11,
  "reversed": false,
  "businessDays": 8,
  "weekendDaysInSpan": 2,
  "holidayDays": 1
}

Tip

Half-open by default: the start date counts and the end date does not

A reversed range gives a signed answer