About BusinessDayKit

BusinessDayKit provides business-day, invoice due date, and U.S. federal holiday calendar tools for practical planning.

What the site does

The tools calculate dates using deterministic code and a documented holiday data source. Pages are designed for freelancers, small businesses, administrative teams, finance staff, and project planners who need quick date checks.

The site focuses on general planning. It does not provide legal, tax, payroll, or accounting advice.

How the site is maintained

BusinessDayKit is generated as a static site. Daily pages are refreshed through an automated build process that updates structured calendar data before the site is deployed. The core calculation rules live in TypeScript code instead of free-form text, which makes the results easier to test and review.

Explanatory content is written to support the tools, not to replace official sources. Holiday pages link back to the source used for federal holiday records, and the data methodology page explains the count rules used across the site.