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YFT
Client-side ProcessingUpdated 2026-02-11Report issue

Runs fully in your browser. Inputs stay on your device. See recent fixes on changelog.

Calendar Reference

View monthly calendars and look up dates for any year.

FreeRuns in browsercalendar referencemonthly calendar

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About Calendar Reference

View monthly calendars and look up dates for any year. View monthly calendars for any year online for free. See days in month, first day of the month, week numbers, and holidays for any month and year combination. Provides instant lookups against a curated, built-in reference database that requires no internet connection. Results are displayed in a clear, structured format for easy reading and copying. Everything runs client-side in your browser for maximum speed and privacy — no data is sent to any server, and no signup is required.

Related tools: Leap Year Checker, Day of Year Calculator, Week Number Calculator

How to Use Calendar Reference

  1. Enter the value you want to look up.
  2. The tool searches its database and returns results.
  3. Review the detailed information displayed below.

Frequently Asked Questions

What is Calendar Reference?
View monthly calendars for any year online for free. See days in month, first day of the month, week numbers, and holidays for any month and year combination.
Where does the lookup data come from?
The reference data is sourced from authoritative and well-maintained databases, standards organizations, and official registries. Data is embedded directly in the tool for instant offline-capable lookups.
How current is the reference data?
The lookup data is updated regularly as part of the tool's release cycle. For data that changes infrequently (such as country codes or HTTP status codes), the embedded dataset is comprehensive and reliable.
Can I search by partial matches?
Yes, the lookup supports partial and fuzzy matching so you do not need to enter the exact value. Start typing and the tool will filter results in real time, making it easy to find what you need.
Is Calendar Reference free to use?
Yes, all lookups are completely free and unlimited. The reference data is built into the tool, so it works instantly without any account.
Is my data safe when using Calendar Reference?
Yes, lookups are performed against locally stored data in your browser. No queries or input data are sent to any external server.

Related Tools

Leap Year Checker
Check if a year is a leap year and find nearby leap years.
Day of Year Calculator
Find the day number (1-366) for any date in the year.
Week Number Calculator
Find the ISO week number for any given date.