Our tool provides precise control down to the second and automatically handles timezone conversions to ensure the file dates you set appear correctly on your computer.
Precision Level
Second-Level Accuracy
- Input precision: You can specify timestamps down to the exact second
- System precision: Most file systems support second-level timestamp precision
- Display accuracy: Timestamps appear exactly as you specified in your local timezone
File System Limitations
Different file systems have varying timestamp precision:
- NTFS (Windows): 100-nanosecond precision (effectively unlimited)
- ext4 (Linux): Nanosecond precision
- APFS (macOS): Nanosecond precision
- FAT32: 2-second precision for modified date, 1-day precision for created date
- exFAT: 10-millisecond precision
Our tool works within the precision limits of your file system.
Timezone Handling
Automatic Timezone Detection
Our tool automatically:
- Detects your local timezone using browser/system settings
- Converts input times to UTC for internal processing
- Applies timezone offset to ensure correct local display
- Handles daylight saving time transitions automatically
Global Compatibility
Supports all worldwide timezones:
- Standard timezones: EST, PST, GMT, CET, JST, etc.
- Daylight saving time: Automatic DST adjustments
- Custom offsets: UTC+/-XX:XX format support
- Historical changes: Accounts for timezone rule changes
Technical Implementation
Precision Workflow
- User input: Created date and modified date in local timezone
- Timezone conversion: Convert to UTC timestamp
- System call: Apply timestamp using OS APIs
- Verification: Confirm file's created date and modified date was set correctly
- Display: Show result in user's local timezone
Quality Assurance
- Input validation: Ensures valid date/time combinations
- Range checking: Prevents impossible dates (e.g., February 30th)
- Format verification: Validates timestamp format before processing
- Error handling: Clear feedback for any issues
Accuracy Verification
How to Verify File Timestamps (Created Date and Modified Date)
- File Properties: Right-click file → Properties → Details
- File Manager: Most file managers display timestamps in file listings
Our commitment to timestamp accuracy ensures that your files will display the exact dates and times you specify, making our tool reliable for both personal and professional use.