When one gets close to the end of a month, it gets difficult to see
all the days around today.  So, using the unix cal program, which
makes
a small ascii calendar:

    August 2007
 S  M Tu  W Th  F  S
          1  2  3  4
 5  6  7  8  9 10 11
12 13 14 15 16 17 18
19 20 21 22 23 24 25
26 27 28 29 30 31

I wrote a script, calaround,

ftp://ftp.ncifcrf.gov/pub/delila/calaround

that allows one to see the two months surrounding the current month:

<    July 2007
<  S  M Tu  W Th  F  S
<  1  2  3  4  5  6  7
<  8  9 10 11 12 13 14
< 15 16 17 18 19 20 21
< 22 23 24 25 26 27 28
< 29 30 31

=    August 2007
=  S  M Tu  W Th  F  S
=           1  2  3  4
=  5  6  7  8  9 10 11
= 12 13 14 15 16 17 18
= 19 20 21 22 23 24 25
= 26 27 28 29 30 31

Here's the documentation:

calaround -help
version = 1.16 of calaround 2007 Aug 31

calaround shows the previous, current and next calendar months

usage: calaround [integer1 [integer2]]

[integer1] and [integer2] are a singlesigned or unsigned integer

EXAMPLES:

calaround 0
   gives just the current month:

=    August 2007
=  S  M Tu  W Th  F  S
=           1  2  3  4
=  5  6  7  8  9 10 11
= 12 13 14 15 16 17 18
= 19 20 21 22 23 24 25
= 26 27 28 29 30 31

The previous months are proceeded by '<'
The current month is proceeded by '='
The next months are proceeded by '>'
The current day is underlined

calaround
   gives the current month and one month before and after

calaround 2
   gives the current month and the two months before and after

calaround -2
   gives the current month and the two months before

calaround +2
   gives the current month and the two months after

calaround 2 8
   gives the next month and the eight months after

You may specify any number of months before and after.

calaround -help
   gives this help information

Source:
ftp://ftp.ncifcrf.gov/pub/delila/calaround

  Dr. Thomas D. Schneider
  National Institutes of Health
  National Cancer Institute
  Center for Cancer Research Nanobiology Program
  Molecular Information Theory Group
  Frederick, Maryland  21702-1201
  [email address]
  permanent email: [email address] (use only if first address fails)
  http://www.ccrnp.ncifcrf.gov/~toms/

Something equivalent with Google calendar would be great.
Possibilities:

1. Sliding a bar up and down to see previous and next months

2. a button to switch to 'half month mode' where the calendar
starts at the center of the month.