DATE2DN Name
DATE2DN Purpose
Find day of year number from date.
Category
Calling Sequence
dn = date2dn(date) Inputs
date = date string (like 6 Jul, 1995). in
Default date is current date and time.
Keyword Parameters
Outputs
dn = day number in year (like 187). out
Common Blocks
Notes
Notes: The format of the date is flexible except that the
month must be month name.
Dashes, commas, periods, or slashes are allowed.
Some examples: 23 sep, 1985 sep 23 1985 1985 Sep 23
23/SEP/85 23-SEP-1985 85-SEP-23 23 September, 1985.
Doesn't check if month day is valid. Doesn't
change year number (like 86 does not change to 1986).
Dates may have only 2 numeric values, year and day. If
both year & day values are < 31 then day is assumed first.
systime() can be handled: dn=date2dn(systime()).
Day number is returned as a string.
For invalid dates dn is set to a null string.
Times are allowed.
Modification History
R. Sterner, 1995 Jul 6
R. Sterner, 2004 Sep 16 --- Made default be current date/time.
Copyright (C) 1995, Johns Hopkins University/Applied Physics Laboratory
This software may be used, copied, or redistributed as long as it is not
sold and this copyright notice is reproduced on each copy made. This
routine is provided as is without any express or implied warranties
whatsoever. Other limitations apply as described in the file disclaimer.txt.