THE DATES, WITHOUT THE GUESSWORK

Plan the year.
Check the boundaries.

Generate clean, printable calendars and inspect the date rules behind them. Runs locally in your browser with a small, dependency-free API.

Open the workbench Read API docs ↗

01 / PRINT ENGINE

Make a calendar that fits your desk

YearMonthWeek startsPaperPage

03 / CALENDAR CONVERTER

Gregorian ↔ Julian

Conversion passes through the integer Julian Day Number. These are proleptic calendars; no local historical adoption date is assumed.

Choose a date and convert.

Two different ideas: the Julian calendar is a civil calendar system; a Julian Day Number is a continuous day count used in astronomy. This tool shows both.

04 / DEVELOPER STUDIO

Try the calendar API

Pick an endpoint, inspect the JSON response, then open the full OpenAPI 3.1 description.

Open API docs ↗

EndpointYearMonth

Select an endpoint and run it.

CALENDAR REFERENCES

Explore printable examples

These are contextual examples from BetaCalendars. Their own pages are the authority for their downloadable designs.

2026 yearly calendar ↗January 2027 ↗Monthly calendars ↗Blank calendar ↗Weekly calendar ↗

Reference check, October 2026: the site currently presents 2026 on its yearly landing page and has month pages such as January 2027. This tool does not reproduce its artwork or claim affiliation.

Plan the year.Check the boundaries.

Make a calendar that fits your desk

Check the tricky dates

Gregorian ↔ Julian

Try the calendar API

Explore printable examples

Plan the year.
Check the boundaries.