DESCRIPTION
This command has 2 modes of operation. If no date argument is
supplied, then the current timestamp for the raster map is printed. If
a date argument is specified, then the timestamp for the raster map is
set to the specified date(s). See examples below.
NOTES
Strings containing spaces should be quoted. For specifying a range of
time, the two timestamps should be separated by a forward slash. To
remove the timestamp from a raster map, use date=none.
TIMESTAMP FORMAT
The timestamp values must use the format as described in the GRASS
Datetime Library. The source tree for this library should have a
description of the format. For convenience, the formats are reproduced
here:
There are two types of datetime values:
Absolute values specify exact dates and/or times. Relative values
specify a span of time.
Absolute
The general format for absolute values is:
  day month year [bc] hour:minute:seconds timezone
	     day is 1-31
	     month is jan,feb,...,dec
	     year is 4 digit year
	     [bc] if present, indicates dates is BC
	     hour is 0-23 (24 hour clock)
	     minute is 0-59
	     second is 0-59.9999 (fractions of second allowed)
	     timezone is +hhmm or -hhmm (eg, -0600)
	     1994 [bc]
	     Jan 1994 [bc]
	     15 jan 1000 [bc]
	     15 jan 1994 [bc] 10 [+0000]
	     15 jan 1994 [bc] 10:00 [+0100]
	     15 jan 1994 [bc] 10:00:23.34 [-0500]
Relative
There are two types of relative datetime values, year-month and
day-second. The formats are:
	     [-] # years # months
	     [-] # days # hours # minutes # seconds
	     2 years
	     5 months
	     2 years 5 months
	     100 days
	     15 hours 25 minutes 35.34 seconds
	     100 days 25 minutes
	     1000 hours 35.34 seconds
	     3 months 15 days
	     3 years 10 days
EXAMPLES
Prints the timestamp for the "soils" raster map. If there is no
timestamp for "soils", nothing is printed. If there is a timestamp,
one or two time strings are printed, depending on if the timestamp for
the map consists of a single date or two dates (ie start and end
dates).
Sets the timestamp for "soils" to the single date "15 sep 1987".
r.timestamp map=soils date='15 sep 1987'
r.timestamp map=soils date='15 sep 1987/20 feb 1988'
r.timestamp map=soils date='18 feb 2005 10:30:00/20 jul 2007 20:30:00'
r.timestamp map=soils date=none
KNOWN ISSUES
Spaces in the timestamp value are required.
SEE ALSO
  r.info,
  r3.timestamp,
  v.timestamp
AUTHOR
Michael Shapiro, U.S.Army Construction Engineering Research Laboratory