gregorian-calendar

Given that Gregorian Calendar start date is 15 Oct 1582, please consider the following tests and please help me understanding what happens: import java.util.Calendar; import java.util.Date; import java.util.GregorianCalendar; import javax.xml.datatype.DatatypeFactory; import org.junit.Test; @Test public void gregorianToDateConversion() { GregorianCalendar calendar = null; Date date = null; calendar = new GregorianCalendar(1582, 9, 04); date = calendar.getTime(); System.out.println("new GregorianCalendar(1582, 9, 4) -> calendar[DAY_OF_MONTH ["+calendar.get(Calendar.DAY_OF_MONTH)+"], MONTH ["

How to convert a gregorian date into the equivalent hebrew date? Also please tell about these calendars as I am not having much knowledge of these. There's a handy class called NSCalendar . You create one like this: NSCalendar * gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar]; NSCalendar * hebrew = [[NSCalendar alloc] initWithCalendarIdentifier:NSHebrewCalendar]; Once you've got the calendar objects, you can use them to convert a date around to various representations: NSDate * date = [NSDate date]; NSDateComponents * components = [gregorian components

I'm new to this site and I have just started learning Java. I'm trying to add couple days to the GregorianCalendar but it doesn't work. Here... (Ignore the top chunk), its the adding dates at the bottom that is annoying. /* * Author:Matt M * Date:8.12.13 * Discription: When the user inputs the deadline, and the difficulity of the project, * the program gives the date he should start working on it */ import java.util.*; public class DeadlinePlanner{ public static void main(String[] args) { //take information and restart questions if information is wrong int month = 0, day = 0 ; do { do { System

I have a program that needs to start on 1/1/09 and when I start a new day, my program will show the next day. This is what I have so far: GregorianCalendar startDate = new GregorianCalendar(2009, Calendar.JANUARY, 1); SimpleDateFormat sdf = new SimpleDateFormat("d/M/yyyy"); public void setStart() { startDate.setLenient(false); System.out.println(sdf.format(startDate.getTime())); } public void today() { newDay = startDate.add(5, 1); System.out.println(newDay); //I want to add a day to the start day and when I start another new day, I want to add another day to that. } I am getting the error

I need Objective C method for converting Gregorian date to Julian days same as this PHP method (GregorianToJD). According to http://en.wikipedia.org/wiki/Julian_day , the Julian day number for January 1, 2000, was 2,451,545. So you can compute the number of days between your date and this reference date. For example (Jan 1, 2014): NSUInteger julianDayFor01012000 = 2451545; NSCalendar *cal = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar]; [cal setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:0]]; NSDateComponents *comp = [[NSDateComponents alloc] init]; comp.year = 2014;

How to convert between calendars? Here is what I have: UmAlQuraCalendar hijri = new UmAlQuraCalendar(); GregorianCalendar cal = new GregorianCalendar(); DateTime hijriDate = new DateTime(1434, 11, 23, hijri); DateTime gregorianDate = ...; // I need a gregorianDate that corresponds to the hijriDate . It seems that the Date saved in DateTime is always in the current calendar. So if the current calendar is Gregorian hijriDate is already in Gregorian. var hijriDate = new DateTime(1434, 11, 23, hijri); //Console writeline will show 2013-09-29 00:00:00 If your current calendar is UmAlQuraCalendar

I received this exception while using GregorianCalendar java.lang.IllegalArgumentException: Bad class: class java.util.GregorianCalendar Who know how to fix, Please help me. p/s : I used the following code : Calendar someDate = GregorianCalendar.getInstance(); someDate.add(Calendar.DAY_OF_YEAR, -7); SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); String formattedDate = dateFormat.format(someDate); UPDATED I should be use this line to achieve the date time : String formattedDate = dateFormat.format(someDate.getTime()); A Calendar can't be directly formatted, you need

According to the official (gregorian) calendar , the week number for 29/12/2008 is 1, because after the last day of week 52 (i.e. 28/12) there are three or less days left in the year. Kinda weird, but OK, rules are rules. So according to this calendar, we have these boundary values for 2008/2009 28/12 is week 52 29/12 is week 1 1/1 is week 1 8/1 is week 2 C# offers a GregorianCalendar class, that has a function GetWeekOfYear(date, rule, firstDayOfWeek) . The parameter rule is an enumeration with 3 possible values: FirstDay, FirstFourWeekDay, FirstFullWeek . From what I've understood I should