Datetime.now returns next year's date

Question

I am using the formulae:

myDatetime = Datetime.now();
myDatetimeStr = myDatetime.format('dd/MM/YYYY');

But the values I get are next' year's date.

13:37:40:000 USER_DEBUG   "Close Date" : "29/12/2016",

How is that even possible that the : DateTime.now() is so wrong?

Debug logs are even more crazy :-/

14:19:22.746 (746983721)|VARIABLE_SCOPE_BEGIN|[163]|myDatetime|Datetime|false|false 14:19:22.747 (747018312)|VARIABLE_ASSIGNMENT|[163]|myDatetime|"2015-12-29T00:00:00.000Z" 14:19:22.747 (747028286)|STATEMENT_EXECUTE|[164] 14:19:22.747 (747037545)|HEAP_ALLOCATE|[164]|Bytes:10 14:19:22.747 (747137413)|HEAP_ALLOCATE|[164]|Bytes:10 14:19:22.747 (747169556)|VARIABLE_SCOPE_BEGIN|[164]|myDatetimeStr|String|false|false 14:19:22.747 (747188016)|VARIABLE_ASSIGNMENT|[164]|myDatetimeStr|"29/12/2016"

Answer 1

Use small y instead of capital Y

Datetime myDatetime = Datetime.now();
String myDatetimeStr = myDatetime.format('dd/MM/yyyy');
system.debug('=========='+myDatetimeStr);

---

IF you looked into this link

http://docs.oracle.com/javase/7/docs/api/java/text/SimpleDateFormat.html

The capital Y merge field is the WEEK YEAR - which from the 27th December 2015 is IN 2016!

The lower case y merge field is the CALENDAR YEAR - which will be 2015 as expected.