Find name of day by year, month and day [duplicate]

Answer 1

Construct a GregorianCalendar with the year, month and day, then query it to find the name of the day. Something like this:

int year = 1977;
int month = 2;
int dayOfMonth = 15;
Calendar myCalendar = new GregorianCalendar(year, month, dayOfMonth);

int dayOfWeek = myCalendar.get(Calendar.DAY_OF_WEEK);

Note that the day of week is returned as an int representing the ordinal of the day in the locale's week day representation. IE, in a locale where the weekday starts on Monday and ends on Sunday, a 2 would represent Tuesday, whereas if the locale weekday starts on Sunday then that same 2 would represent Monday.

Edit

And since there is alot of answer editing going on, allow me to add the following:

DateFormatSymbols symbols = new DateFormatSymbols(Locale.getDefault());
String dayOfMonthStr = symbols.getWeekdays()[dayOfMonth];

Thought to be honest, I like the SimpleDateFormatter approach better, because it encapsulates the very same code as I've shown above. Silly me to forget all about it.

Answer 2

Calendar cal = Calendar.getInstance();
cal.set(Calendar.DAY_OF_MONTH, 22); //Set Day of the Month, 1..31
cal.set(Calendar.MONTH,6); //Set month, starts with JANUARY = 0
cal.set(Calendar.YEAR,2011); //Set year
System.out.println(cal.get(Calendar.DAY_OF_WEEK)); //Starts with Sunday, 6 = friday

Answer 3

You can do something like this to get the names of the days of the week for different locales.

Here's the important part:

DateFormatSymbols dfs = new DateFormatSymbols(usersLocale);
String weekdays[] = dfs.getWeekdays();

That can be combined with this:

Calendar cal = Calendar.getInstance();
int day = cal.get(Calendar.DAY_OF_WEEK);

To get what you're looking for:

String nameOfDay = weekdays[day];