leapsecs 1 user commands djbwares leapsecs compile the leap seconds table used by the Bernstein TAI library leapsecs leapsecs compiles the leapsecs.dat file, that is required by the Bernstein TAI library, from a source text file. It reads the source text file on its standard input, and writes the compiled data file on its standard output. The source file is published by Daniel J. Bernstein, amongst many others. The only lines that leapsecs cares about begin with a + in the first column, followed by a date in ISO 8604 form. The leap second written to the table is an (assumed) positive leap second on the last second of that date. /usr/local/etc/leapsecs.dat Primary location of the leap seconds table used by the djbwares toolset. /usr/local/share/libtai/leapsecs.dat Secondary location of the leap seconds table used by the djbwares toolset. This is where the database file shipped in the leapsecs package is placed on the BSDs. /etc/leapsecs.dat Tertiary location of the leap seconds table used by the djbwares toolset. Primary location of the leap seconds table used by the original Bernstein TAI library. /usr/share/libtai/leapsecs.dat Quaternary location of the leap seconds table used by the djbwares toolset. This is where the database file shipped in the leapsecs package is placed on Linux operating systems. leapsecs was originally part of Daniel J. Bernstein's libtai toolset in 1999. Original code by Daniel J. Bernstein. Documentation by Jonathan de Boyne Pollard.