Zemanim
From RonWareWiki
zemanim -- a simple calculator for halachic times
"zemanim" is a command-line program which calculates and displays "halachic times". It is designed to be easily customized by means of the included "ini" file.
Invoking "zemanim" produces a display like:
Halachic times for Maale Adummim: dawn sunup shema tfila m:ged m:qet m:plg sundn night midnt shaah sedra 10 Oct 2009 05:02 05:38 08:31 09:29 11:53 14:46 15:59 17:12 17:42 23:25 00:57 holiday 16 Oct 2009 05:06 05:42 08:32 09:29 11:51 14:42 15:53 17:05 17:35 23:24 00:56 Bereshit 23 Oct 2009 05:11 05:47 08:34 09:30 11:49 14:37 15:47 16:58 17:27 23:23 00:55 Noach 30 Oct 2009 05:16 05:53 08:37 09:32 11:49 14:33 15:42 16:51 17:21 23:22 00:54 Lech-Lecha
Of course, one may modify the behavior by giving command-line options. For example, invoking "zemanim Chicago 1" gives:
Halachic times for Chicago: dawn sunup shema tfila m:ged m:qet m:plg sundn night midnt shaah sedra 07 Oct 2009 06:21 06:54 09:46 10:43 13:06 15:58 17:10 18:22 18:55 00:08 00:56 holiday
The various options can be found by invoking "zemanim -h". It is also informative to look inside the "zemanim.ini" file which is distributed with the program.
The current version is 2.02, and is available here. The zip includes Windows, Linux and Mac OS/X versions of the program (which are functionally identical). Unpack the zip file somewhere on your PATH, and enjoy. The 'zemanim.ini' file must be located in the same place as the program file in order for it to take effect.
Halachic Times
Judaism determines correct times for various ritual observances on astronomically visible phenomena. The most important of these are "sunrise", "sunset" and "visibility of three stars".
About
The program is written in Reva Forth, and the source code will be available in the 9.0.6 and later releases (not yet released).
Please send Ron your feedback on this program.