y2038 | Fix time.h on 32 bit machines to work past the year 2038 bug | Command Line Interface library

y2038 is a C library typically used in Utilities, Command Line Interface applications. y2038 has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

This is an implementation of POSIX time.h which solves the year 2038 bug on systems where time_t is only 32 bits. It is implemented in bog-standard ANSI C. The latest version can be found at It makes use of the system's native 32 bit functions to perform time zone and daylight savings time calculations and thus does not need to ship its own time zone table. Here is a list of the currently implemented functions in time64.h and their POSIX time.h equivalents. localtime64_r localtime_r localtime64 localtime gmtime64_r gmtime_r gmtime64 gmtime asctime64_r asctime_r asctime64 asctime ctime64_r ctime_r ctime64 ctime timelocal64 mktime mktime64 mktime timegm64 timegm (a GNU extension). To install, simply copy time64.c and time64.h into your project and make use of the functions. To test, run "make test". You must have Perl, prove (which comes with a recent version of the Test::Harness Perl module) and bzdiff installed to run the full test suite. It will do a number of unit tests, plus test against a large table of known good values in different time zones.