Mac HFS Timestamp Converter
Convert Mac HFS+ seconds-since-1904 timestamps to readable dates and back, with Unix time cross-reference.
Decode Mac HFS+ timestamps from legacy Apple systems
HFS Plus stores timestamps as unsigned 32-bit seconds since 1 January 1904 UTC. Forensic exports, vintage iPod metadata, and older Mac archives still surface these values. Convert HFS+ seconds to readable dates, translate Unix seconds, or encode a local date back to HFS+ format.
For Active Directory FILETIME values, use the LDAP Timestamp to Date Converter.
Epoch offset
Unix time and HFS+ time differ by 2,082,844,800 seconds. To convert HFS+ to Unix, subtract that offset. To convert Unix to HFS+, add the same offset.
Frequently Asked Questions
What is the valid HFS+ range?
Unsigned 32-bit HFS+ timestamps run from 0 (1 January 1904) through 4,294,967,295 (6 February 2040 UTC).
Are values stored in local time?
HFS+ catalog timestamps are defined in GMT/UTC. Some legacy volume headers used local time, so very old exports may need manual offset review.
How is Unix input detected?
Values above the 32-bit HFS+ maximum are treated as Unix seconds and converted to the equivalent HFS+ timestamp automatically.
Related Tools
BEE Calculator
PEG Ratio Calculator
Convert Unicode to UTF-16
Implantation Calculator
Magnetic Force Between Wires Calculator
True Airspeed
Velocity
Open Channel Flow Calculator
Bladder Volume Calculator
EUI Calculator
Land Loan Payment Calculator
Skew Image
Ibuprofen Dosage Calculator
Remove Zalgo Text
PVIFA Calculator
Convert 24hr to 12hr
Greek Gematria Calculator
QR Code Scanner
Difference of Two Squares Calculator
JPG to PNG Converter