dd/mm/yyyy vs dd/MM/yyyy?

Question

SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy");         String date = sdf.format(new Date());          System.out.println(date);  

Result is todays date i.e 23/03/2014

But when i do

 SimpleDateFormat sdf = new SimpleDateFormat("dd/mm/yyyy");  

result can be 23/05/2014, 23/05/2014, 23/06/2014 and son with each run of prgram. Why so?

Answer 1

It's because mm is for minutes, not months. More in the documentation.

Answer 2

In C# and VB.NET, it's a case sensitive especially to format the Month or Minutes. Because initial character of both the words is same.

The following detail may help you in formatting the date & time.

1. d/D: day without 0 prefix on single digit.  2. dd/DD: day with 0 prefix if single digit. 3. M: Month without 0 prefix on single digit. 4. MM: Month with 0 prefix if single digit. 5. yy/YY: Last two digit of year. 6. yyyy/YYYY: represents full year. 7. HH: 24 hour based hour. ie. 13:00. **H** will display hour without prefix 0 if single digit 8. hh: 12 hour based hour. ie. 01:00. **h** will display hour without prefix 0 if single digit 9. m: minute without 0 prefix on single digit.  10.mm: minute with 0 prefix if single digit. 11.s: second without 0 prefix on single digit.  12.ss: second with 0 prefix if single digit. 13.tt: represent the AM or PM