Date Operations

kidd has asked for the wisdom of the Perl Monks concerning the following question:

I want to create a CGI so I can send reminders in a certain time, but Im having an awful time adding days to my date(huh?)

Maybe I should give an example...

Lets say today is 20/10/2002 dd/mm/yyyy

and the user wants to be reminded in 15 days, so the remind day must be: 4/11/2002 considering that October has 31 days(correct me if Im wrong)...

But Im done with the if/else 'cause it makes the process slower and has a lot of bugs...

If someone could give me and idea Ill be grateful, since im desperate...

Thanks

Comment on Date Operations

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Re: Date Operations by emilford (Friar) on Jul 02, 2002 at 01:44 UTC
Consider using the Date::Calc module; it's incredible for such tasks. If you're looking to add "$offset" days to your current date, you could use something like this: `use Date::Calc qw(Add_Delta_Days); ($year, $month, $day) = Add_Delta_Days($old_year, $old_month, $old_day +, $offset);` [download] This will return the new year, month, and day after adding the offset ($offset). Once you have those values, I think you can take it from there. Look up the documentation for this module. There are so many more features available and it will save you a ton of time and headaches! Hope this helps, Eric	[reply] [d/l]
Re: Date Operations by mojotoad (Monsignor) on Jul 02, 2002 at 03:26 UTC
I was going to suggest that you need not bother with any of the date modules for such a "simple" calculation -- you could merely add `$days6060*24` to the seconds since epoch followed by a reverse transformation. However, in 2002, DST reverts on October 27th, so such a calculation would fail by coming up one hour short. It is precisely due to such gotchas that the date modules come in handy. I've had good results with Date::Calc (fast but requires a C compiler), Date::Manip (slower, possibly more complete for esoteric dates, no C), and Time::Piece (C compiler). Matt	[reply] [d/l]
Re: Date Operations by joshua (Pilgrim) on Jul 02, 2002 at 03:33 UTC
If you just need the date and not the time, and you're not running the script at 12 am or 11 pm, you could use something like this... `use strict; use POSIX qw[strftime]; my $date = strftime('%d/%m/%Y', localtime(time + 60 * 60 * 24 * 15));` [download] Joshua	[reply] [d/l]