📅 Date Format Converter
Convert between different date formats and standards with ease.
Converter
Formats
Timezone
Examples
FAQ
Date Format Converter
Enter a date in any format and see it converted to all major date standards instantly.
Today
Y2K
Unix Epoch
Christmas
New Year
Leap Day
Input Date
Input Format
Auto-detect
MM/DD/YYYY (US)
DD/MM/YYYY (EU)
YYYY-MM-DD (ISO)
YYYY/MM/DD
DD-MM-YYYY
MM-DD-YYYY
DD.MM.YYYY
Unix Timestamp
Time (Optional)
Converted Formats
US Format
Copy
European Format
Copy
ISO 8601
Copy
RFC 3339
Copy
Unix Timestamp
Copy
Long Format
Copy
Julian Day
Copy
Excel Serial
Copy
Conversion History
Clear History
Date Format Standards
Understanding different date format standards used worldwide.
🇺🇸 US Format (MM/DD/YYYY)
07/16/2025
Most common format in the United States. Month comes first, followed by day and year.
Variations:
MM-DD-YYYY, MM.DD.YYYY
🇪🇺 European Format (DD/MM/YYYY)
16/07/2025
Standard format in most European countries. Day comes first, followed by month and year.
Variations:
DD-MM-YYYY, DD.MM.YYYY
🌐 ISO 8601 (YYYY-MM-DD)
2025-07-16
International standard for date representation. Year first, unambiguous worldwide.
With time:
2025-07-16T14:30:00Z
📧 RFC 3339
2025-07-16T14:30:00.000Z
Internet standard for timestamps in email headers and web protocols.
Features:
Timezone awareness, milliseconds
⚡ Unix Timestamp
1752681600
Seconds since January 1, 1970 UTC. Used in programming and databases.
Range:
1970-2038 (32-bit), unlimited (64-bit)
📋 Excel Serial Date
45856
Days since January 1, 1900. Used in Microsoft Excel and other spreadsheet applications.
Note:
Has leap year bug for 1900
Common Date Formats Examples
Today
Multiple formats
Y2K
January 1, 2000
Unix Epoch
January 1, 1970
Moon Landing
July 20, 1969
Timezone Conversion
Convert dates across different timezones and see local time representations.
Source Timezone
UTC (Coordinated Universal Time)
Eastern Time (ET)
Central Time (CT)
Mountain Time (MT)
Pacific Time (PT)
London (GMT/BST)
Paris (CET/CEST)
Moscow (MSK)
Tokyo (JST)
Beijing (CST)
Sydney (AEDT/AEST)
Target Date & Time
Global Time Zones
Usage Examples
Real-world examples of date format conversion scenarios.
Programming Examples
JavaScript Date
new Date('2025-07-16T14:30:00.000Z')
Python datetime
datetime(2025, 7, 16, 14, 30, 0)
Java LocalDateTime
LocalDateTime.of(2025, 7, 16, 14, 30, 0)
C# DateTime
new DateTime(2025, 7, 16, 14, 30, 0)
Database Examples
MySQL DATE
'2025-07-16'
PostgreSQL TIMESTAMP
'2025-07-16 14:30:00'
SQLite datetime
'2025-07-16 14:30:00'
MongoDB Date
ISODate("2025-07-16T14:30:00.000Z")
API Response Examples
REST API (ISO)
{"created_at": "2025-07-16T14:30:00.000Z"}
GraphQL
createdAt: "2025-07-16T14:30:00.000Z"
XML
<date>2025-07-16T14:30:00.000Z</date>
Frequently Asked Questions
Which date format should I use?
ISO 8601 (YYYY-MM-DD) is recommended for international applications as it's unambiguous and sorts correctly.
How does auto-detection work?
The converter analyzes patterns like separators, number positions, and ranges to determine the most likely format.
What about ambiguous dates like 01/02/2025?
The converter will flag ambiguous dates and ask you to specify the format explicitly.
Are leap years handled correctly?
Yes, the converter accounts for leap years in both Julian and Gregorian calendar systems.
What's the valid date range?
The converter works for dates from January 1, 1970 to December 31, 2099 for most formats.
How accurate are Unix timestamps?
Unix timestamps are accurate to the second. For millisecond precision, use RFC 3339 format.
Can I convert historical dates?
Yes, but be aware that dates before October 15, 1582 use the Julian calendar system.
What about timezone conversions?
The converter can handle timezone-aware formats like RFC 3339 and convert between different timezones.