Plan 9 from Bell Labs’s /usr/web/sources/patch/applied/man-1-mtime/mtime.new
.TH MTIME 1 .SH NAME mtime \- print file modification time .SH SYNOPSIS .B mtime .I file ... .SH DESCRIPTION .I Mtime prints the modification time (in seconds since the epoch) and name of each .I file. .SH SOURCE .B /sys/src/cmd/mtime.c