I want to subtract days from date in java. But I dont want to use external libraries. I have referred some of questions from stackoverflow but they are suggesting to use external libraries. So I have applied following logic  noOfDays = 24; Date compareDate = new Date(currentDate - noOfDays * 24 * 60 * 60 * 1000); System.out.println("compare date " + compareDate);   It is working fine till 24 days.But after 24 days it is giving unexpected result. Is there any solution to this ?
29212
Anyone know a simple way using Java calendar to subtract X days from a date?  I have not been able to find any function which allows me to directly subtract X days from a date in Java. Can someone point me to the right direction?
23049
Using standard mysql functions is there a way to write a query that will return a list of days between two dates.  eg given 2009-01-01 and 2009-01-13 it would return a one column table with the values:   2009-01-01   2009-01-02   2009-01-03  2009-01-04   2009-01-05  2009-01-06  2009-01-07  2009-01-08   2009-01-09  2009-01-10  2009-01-11  2009-01-12  2009-01-13   Edit: It appears I have not been clear. I want to GENERATE this list. I have values stored in the database (by datetime) but want them to be aggregated on a left outer join to a list of dates as above (I am expecting null from the right side of some of this join for some days and will handle this).
40309
What is the best way to convert a double to a long without casting?  For example:  double d = 394.000; long l = (new Double(d)).longValue(); System.out.println("double=" + d + ", long=" + l);
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Is it possible to use the =today() function (or something else) to insert the current date but then not update each time the file is opened?  I want to create a numbers template for my invoices. I'd like it to auto fill invoice date and date due then, when I save the document, store the values, not the function.
114213
New LaTex user here, hoping you can help me.   I am drafting a letter, the submission date of which I do not yet know. For this reason I am dating it using \today. However, in the text of the letter, I would like to specify a date two weeks in advance of \today. In other words, there is an [advance date] and an [advance date II], the latter specifying a date 14 days after the former.  I found the advdate package but, unless I am mistaken, it doesn't allow for setting two individual hypothetical dates. Is there a non-complicated way of implementing this?  Thanks for your help.
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I have an issue -   The javascript Date("mm-dd-yyyy") constructor doesn't work for FF.  It works fine for IE.   IE : new Date("04-02-2008") => "Wed Apr 2 00:00:00 EDT 2008" FF2 : new Date("04-02-2008") => Invalid Date       So lets try another constructor. Trying this constructor Date("yyyy", "mm", "dd")   IE : new Date("2008", "04", "02"); => "Fri May 2 00:00:00 EDT 2008" FF : new Date("2008", "04", "02"); => "Fri May 2 00:00:00 EDT 2008" IE : new Date("2008", "03", "02"); => "Wed Apr 2 00:00:00 EDT 2008" FF : new Date("2008", "03", "02"); => "Wed Apr 2 00:00:00 EDT 2008"   So the Date("yyyy", "mm", "dd") constructor uses an index of 0 to represent January.   Has anyone dealt with this? There must be a better way than subtracting 1 from the months.
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I'd like to be able to print text that varies depending on whether the date matches a given date string  For example  suppose there was a command   \iftoday#1#2#3   which printed #2 if \today matched the string in #1 and #3 otherwise.  So a sample of my proposed usage would be:     \iftoday{February 3, 2016}{There's no garbage today}{Please put out the garbage}    I've tried various commands like pdftexcmd's strcmp, to no avail.    I suspect the problem may have to do with matching the string generated by \today.    While on screen it appears that \today returns February 3, 2016. I can't get it to match February 3, 2016 when I compare strings.  Obviously, I'd be perfectly happy if I could get this to work by represent today's date in any of the standard date formats.  Thanks very much in advance for any suggestions.
23276
I have set up a Google spreadsheet for managing projects and due dates, and I need to apply the following formatting to a column of dates, but I'm not sure how:   Dates more than 7 days from today: Black   Dates less than or equal to 7 days from today: Green   Dates before today (late projects): Red   , but this doesn't actually do what it needs to do. It turns dates that are only 1 week LATE orange. It does not change dates that are one week AWAY orange. So this isn't working... unless I'm missing something.
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Given a week number, e.g. date -u +%W, how do you calculate the days in that week starting from Monday?  Example rfc-3339 output for week 40:  2008-10-06 2008-10-07 2008-10-08 2008-10-09 2008-10-10 2008-10-11 2008-10-12
106040
I've been using Javascript's Date for a project, but noticed today that my code that previously worked is no longer working correctly. Instead of producing Feb as expected, the code below produces March.   My code looks something like this:   current = new Date(); current.setMonth(current.getMonth()+1); //If today is Jan, expect it to be Feb now   This code worked everyday up until today. Is this a Javascript bug or am I going about this the wrong way?
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I doubt I am the only one who has come up with this solution, but if you have a better one please post it here. I simply want to leave this question here so I and others can search it later.   I needed to tell whether a valid date had been entered into a text box and this is the code that I came up with. I fire this when focus leaves the text box.  try {     DateTime.Parse(startDateTextBox.Text); } catch {     startDateTextBox.Text = DateTime.Today.ToShortDateString(); }
23943
How can I execute a command making it believe that is on a different date than system one?  For instance, if I have this script:  #!/usr/bin/env bash     date +"%B %d, %Y"   It prints the actual date: march 13, 2014   But I would like it to print a different date, on the future or past, without changing the system date.  If I wasn't clear enough, I want a command line tool like .    I do not want to use a different script (it was just an example). I do not want to set a cronjob. I do not want to change my general system date. Only change the date that apply to the command to run.
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Is there any tool in Solaris UNIX (so no GNU tool available) to subtract dates? I know that in Linux we have gawk that can subtract one date from another. But in Solaris the maximum we have is nawk (improved awk) which cannot perform date calculations. Also I cannot use perl.  Is there any way to do date calculations like 20100909 - 20001010?  UPDATE: Is bc able to perform dates calculations?
12890
I am using the datetime Python module.  I am looking to calculate the date 6 months from the current date. Could someone give me a little help doing this?  The reason I want to generate a date 6 months from the current date is to produce a review date.  If the user enters data into the system it will have a review date of 6 months from the date they entered the data.
15186
I am working on a project where the requirement is to have a date calculated as being the last Friday of a given month.  I think I have a solution that only uses standard Java, but I was wondering if anyone knew of anything more concise or efficient. Below is what I tested with for this year:      for (int month = 0; month &lt; 13; month++) {         GregorianCalendar d = new GregorianCalendar();         d.set(d.MONTH, month);         System.out.println("Last Week of Month in " + d.getDisplayName(d.MONTH, Calendar.LONG, Locale.ENGLISH) + ": " + d.getLeastMaximum(d.WEEK_OF_MONTH));         d.set(d.DAY_OF_WEEK, d.FRIDAY);         d.set(d.WEEK_OF_MONTH, d.getActualMaximum(d.WEEK_OF_MONTH));         while (d.get(d.MONTH) &gt; month || d.get(d.MONTH) &lt; month) {             d.add(d.WEEK_OF_MONTH, -1);         }         Date dt = d.getTime();         System.out.println("Last Friday of Last Week in  " + d.getDisplayName(d.MONTH, Calendar.LONG, Locale.ENGLISH) + ": " + dt.toString());     }
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I need to do a date comparison in Mysql without taking into account the time component i.e. i need to convert '2008-11-05 14:30:00' to '2008-11-05'  Currently i am doing this:  SELECT from_days(to_days(my_date))   Is there a proper way of doing this?
62923
I have two dates as the following , I want to get the duration spent between them.   6/29/2015 12:18:04 PM    Regards,