Day is wrong prior to 10/15/1582

[wgoldman]

Due to leap year some days were skipped. The date mechanism does not account for that. See this site for days lost; ​http://www.henk-reints.nl/cal/gregcal.htm

Basically Oct. 5 thru Oct. 14, 1582 were skipped. We went from Thursday October 4, 1582 to Friday October 15, 1582. However your calendar shows October 4 as a Monday. I have attached an implementation that illustrates this. Also follows is how java handles it (it is a little better).

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); try {

System.out.println(sdf.parse("1582-10-04")); System.out.println(sdf.parse("1582-10-05")); System.out.println(sdf.parse("1582-10-06")); System.out.println(sdf.parse("1582-10-07")); System.out.println(sdf.parse("1582-10-15"));

/* produces

• Thu Oct 04 00:00:00 CST 1582
• Fri Oct 15 00:00:00 CST 1582
• Sat Oct 16 00:00:00 CST 1582
• Sun Oct 17 00:00:00 CST 1582
• Fri Oct 15 00:00:00 CST 1582 */

} catch (ParseException e) {

TODO Auto-generated catch block e.printStackTrace();

}

[wgoldman]

date picker source to illustrate bug.

[kbwood]

JavaScript uses the ​proleptic Gregorian calendar which extends the current Gregorian calendar back to dates before its introduction. Hence it does not take account of the missing days in 1582.

[Scott González]

Milestone TBD deleted