Resources built for developer docs, academic references, and editorial guides

Every asset pairs practical day-number outputs with context, examples.

For developers & data teams

Ready-to-use code snippets and widgets for integrating day numbers into existing workflows.

Excel, SQL, Python, and JavaScript snippets for calculating ordinal days and time remaining.

Keep sprint cadences and payroll cycles aligned with ISO-compliant week math.

Drop-in components with attribution-friendly embeds and live day/week counts for dashboards.

Authoritative explainers designed for course materials, knowledge bases, and research references.

Full library of day-of-year, countdown, and interval formulas for spreadsheets and templates.

Explain the full date/time spec, week numbering rules, and conversion patterns with rich visuals.

High-resolution printable calendars with ISO context for presentations and classroom walls.