timestamp, a FORTRAN90 code which prints the current YMDHMS date (year-month-day-hours-minutes-seconds) as a timestamp.

This is useful when documenting the run of a program. By including a timestamp, the output of the program will always contain a clear indication of when it was created. Other indicators, such as the file modification timestamp, may be misleading or subject to unintentional modification.

TIMESTAMP simply gives the current time. If you are trying to do careful timings of the speed of execution of a computer code, this may not be very accurate, especially on a computer that uses timesharing. In that case, there are better solutions that measure just the CPU time associated with your process. See, for instance, the examples in TIMER


The computer code and data files made available on this web page are distributed under the MIT license


timestamp is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version and an Octave version and a Python version and an R version.

Related Data and Programs:

timer_test, a FORTRAN90 code which shows how to compute the elapsed CPU time inside a program.


WTIME, a FORTRAN90 code which returns a reading of the wall clock time in seconds.

Source Code:

Last revised on 08 September 2020.