Calendar Calculator
Display a complete monthly calendar for any month and year with this free calculator. See days in each month, weekday layout, and a visual grid with today highlighted.
About This Calculator
The Calendar Calculator is a free online tool that displays a complete monthly calendar for any month and year you select. Whether you need to check what day of the week a specific date falls on, plan events around month boundaries, or simply view the calendar layout for scheduling, this calculator provides a quick and accurate visual calendar grid. It uses the Gregorian calendar system, which is the most widely used civil calendar worldwide.
How It Works
Select a month from the dropdown and enter a year, then click Show Calendar. The calculator determines the number of days in the selected month using the Gregorian calendar rules, including automatic leap year detection. It computes which weekday the 1st of the month falls on, then builds a complete 7-column grid showing all days arranged in weekly rows. Days that belong to the previous or next month are hidden, making the current month's layout easy to read. If the selected month includes today's date, it is highlighted with a distinct background color for quick identification.
Features
- Days in Month: Displays the total number of days for the selected month and year
- Calendar Grid: Full 7-column visual layout with day numbers arranged by week
- Today Highlighting: Automatically highlights the current date when viewing the current month
- Weekday Headers: Sunday through Saturday labels for easy navigation
- Leap Year Support: Correctly handles February 29 in leap years
- Shareable URLs: Your month and year are saved in the URL for bookmarking and sharing
Regional Notes
The Gregorian calendar is the internationally accepted civil calendar used across India, the United States, the United Kingdom, and most of the world. The calendar grid displays Sunday as the first day of the week, which is the standard in the US, while in India and the UK, Monday is often considered the first day in business contexts. The day names and month names are in English to serve a global audience. Week numbering and public holidays are not included — for business day calculations, see the Business Days Calculator on this site.
Common Use Cases
Use this calculator to quickly look up what day of the week a past or future date falls on, plan monthly schedules and appointments, check month boundaries for project milestones, verify leap years and February lengths, create printable monthly calendars for personal or business planning, and teach children about calendar structure and months of the year. The visual grid format makes it easy to see the entire month at a glance.
Frequently Asked Questions
How does the Calendar Calculator work?
Simply select a month and year, then click Show Calendar. The calculator uses the Gregorian calendar system to determine the number of days in the selected month, the first day of the week, and generates a full visual calendar grid with day numbers arranged in weekly rows. Today's date is automatically highlighted if it falls within the selected month.
Is the Calendar Calculator free to use?
Yes, all calculators on Calculy are completely free to use with no registration or hidden fees. You can view any month's calendar as many times as needed and bookmark the URL with your selected month and year pre-filled for quick access.
How many days are in each month?
January has 31 days, February has 28 days (29 in leap years), March has 31, April has 30, May has 31, June has 30, July has 31, August has 31, September has 30, October has 31, November has 30, and December has 31. The calendar calculator automatically shows the correct number based on the selected year.
What is a leap year and how is it calculated?
A leap year occurs every 4 years when February has 29 days instead of 28. A year is a leap year if it is divisible by 4, except for century years which must be divisible by 400. For example, 2024 was a leap year, 2028 will be a leap year, but 2100 will not be a leap year. The calendar calculator automatically accounts for leap years.
What does the first day of the week tell me?
The first day of the week for a given month shows which weekday the 1st of the month falls on. In the calendar grid, the first row starts with empty cells before the 1st to align the days correctly. This helps you quickly see which dates fall on which days of the week for planning events, meetings, and schedules.
Can I share my calendar view with others?
Yes, the calendar calculator saves your selected month and year in the URL. You can copy the URL from your browser's address bar or use the share button to copy the link. Anyone opening that link will see the exact same month and year you selected.
Does the calendar work for past and future dates?
Yes, the calendar calculator works for any month and year, past or future. Select any year from 1970 onwards to view its calendar. This is useful for looking up what day of the week a past event occurred on, planning future events, or viewing historical calendars.
How is today's date highlighted in the calendar grid?
If the current month and year match your selection, the calendar grid automatically highlights today's date with a distinct background color and bold text. This makes it easy to quickly locate the current date within any month's calendar view.