java date parse missbehaviour

user9709261 :

SimpleDateFormat sdf = new SimpleDateFormat("MMM dd, YYYY, EEE", Locale.US);

System.out.println(sdf.format(new Date()));
System.out.println(sdf.format(sdf.parse("Apr 27, 2018, Fri")));

Java does not parse the date as expected and outputs:

Apr 27, 2018, Fri
Jan 05, 2018, Fri // I can not understand why java parse the month of April as January

achAmháin :

Your problem is that you are using YYYY, which represents Week year, whereas you wanted yyyy which represents year, see all options here.

SimpleDateFormat sdf = new SimpleDateFormat("MMM dd, yyyy, EEE", Locale.US);

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