dbohdan 2017-08-23: now is a tiny little date and time calculator utility for the command line. It leverages Tcl's clock add for date arithmetic.
Download with wiki-reaper: wiki-reaper -x 48963 0 | tee now.tcl
#! /usr/bin/env tclsh # now v0.1.0 copyright (c) 2017 dbohdan. License: MIT. package require Tcl 8.5 set formatOpts {} while {[lindex $argv 0] in {-format -gmt -locale -timezone}} { set argv [lassign $argv k v] lappend formatOpts $k $v } puts [clock format [clock add [clock seconds] {*}$argv] {*}$formatOpts]
$ now Wed Aug 23 19:46:15 DST 2017 $ now -3491 days Fri Feb 01 19:46:37 STD 2008 $ now -timezone :UTC -9 years -6 months -22 days +5 hours 5 minutes Fri Feb 01 22:54:59 UTC 2008