Time Strings
============

   Several commands use time strings to specify a range of times.  This
section describes how to write time strings.

   A time string may be a list of simple time strings separated with a
vertical bar `|' or a comma `,'.

   Each simple time string must begin with `Su', `Mo', `Tu', `We',
`Th', `Fr', or `Sa', or `Wk' for any weekday, or `Any' for any day.

   Following the day may be a range of hours separated with a hyphen
using 24 hour time.  The range of hours may cross 0; for example
`2300-0700' means any time except 7 AM to 11 PM.  If no time is given,
calls may be made at any time on the specified day(s).

   The time string may also be the single word `Never', which does not
match any time.  The time string may also be a single word with a name
defined in a previous `timetable' command (*note Miscellaneous
(config)::.).

   Here are a few sample time strings with an explanation of what they
mean.

`Wk2305-0855,Sa,Su2305-1655'
     This means weekdays before 8:55 AM or after 11:05 PM, any time
     Saturday, or Sunday before 4:55 PM or after 11:05 PM.  These are
     approximately the times during which night rates apply to phone
     calls in the U.S.A.  Note that this time string uses, for example,
     `2305' rather than `2300'; this will ensure a cheap rate phone
     call even if the computer clock is running up to five minutes
     ahead of the real time.

`Wk0905-2255,Su1705-2255'
     This means weekdays from 9:05 AM to 10:55 PM, or Sunday from 5:05
     PM to 10:55 PM.  This is approximately the opposite of the
     previous example.

`Any'
     This means any day.  Since no time is specified, it means any time
     on any day.