Validate Calendar Date - Date Validation Calculator

Our free online date validation calculator helps you validate and check if calendar date values are valid. Perfect for date validation, date format checking, and date verification. No software installation required - everything runs locally in your browser with real-time validation and comprehensive date format support.

Key Features

Multiple Date Formats - Support for ISO, US, EU, UK, full, short, and Unix formats
Real-time Validation - Instant validation as you type with live updates
Current Date Integration - Use current date with one click
Quick Examples - Pre-built examples for common date scenarios
Detailed Analysis - Comprehensive date analysis and format detection
Error Handling - Clear validation and error messages for invalid inputs
Copy & Export - Easy copying of results to clipboard

Supported Date Formats

ISO Format - YYYY-MM-DD (2024-01-15)
US Format - MM/DD/YYYY (01/15/2024)
EU Format - DD/MM/YYYY (15/01/2024)
UK Format - DD/MM/YYYY (15/01/2024)
Full Format - Month DD, YYYY (January 15, 2024)
Short Format - Mon DD, YYYY (Jan 15, 2024)
Unix Timestamp - Unix timestamp (1705276800)

How to Use

Enter Date - Input your date in any supported format
Select Format - Choose specific format or use auto-detect
View Results - See validation results and detailed analysis
Copy Results - Copy the validation results to your clipboard

Use Cases

Date Validation - Validate date inputs in forms and applications
Format Checking - Check if date strings are in correct format
Date Verification - Verify date values before processing
Data Processing - Validate date data for analysis and reporting
Date Management - Validate date entries in scheduling systems
Date Tracking - Validate date logs and work periods

Frequently Asked Questions

What date formats are supported?

Our tool supports 7 different date formats: ISO format (YYYY-MM-DD), US format (MM/DD/YYYY), EU format (DD/MM/YYYY), UK format (DD/MM/YYYY), full format (Month DD, YYYY), short format (Mon DD, YYYY), and Unix timestamp format. The tool can auto-detect the format or you can specify it manually.

How does the tool handle invalid dates?

The tool provides clear error messages for invalid dates, including specific details about what makes the date invalid. It checks for valid months (1-12), days (1-31), years, leap years, and date existence, and provides helpful feedback for correction.

Can I use the current date?

Yes! Click the "Use Current Date" button to automatically populate the input field with the current date. This is perfect for quick validation of the current date or testing the tool with real-time data.

What information does the result include?

The result includes validation status (valid/invalid), detected format, formatted date display, detailed date analysis (year, month, day, day of week, month name, leap year status), and format-specific information like Unix timestamp details.

Is there a limit on the number of dates I can validate?

No, there are no limits on the number of dates you can validate. The tool runs entirely in your browser, so you can validate as many dates as needed without any restrictions.

Can I copy the results?

Yes! The tool provides a copy button that allows you to copy the validation results to your clipboard. You can then paste the results into any application or document that supports text input.