Mac HFS+ Timestamp Converter
Convert a Mac HFS+ timestamp — seconds since 1904 — to a readable date and back.
UTC / GMT
Your local time
ISO 8601
Relative
Unix seconds
Unix milliseconds
Current time updating:
How it works
Conversion: unix = hfs − 2082844800. The tool then formats the resulting date.
Enter a value to convert it to a human-readable date, or click Use current time. Conversion is two-way and runs entirely in your browser.
Frequently asked questions
What epoch does HFS+ use?
The classic Mac OS and the HFS+ file system count seconds since 1904-01-01 00:00:00. That is 2,082,844,800 seconds before the Unix epoch.