如何在给定日期 - 月份和日期的情况下返回正确的星期几

Question

just to simplify my question i have this following code

var date = new Date( 2015 , 10 , 16 );

//print the day of the week on console
console.log( date.getDay() ); //prints 1

as far as i understand it should have printed 5 since it is a Friday not Monday but it is not , what could be the problem or am i not comprehending the date object?

Thanks.

Answer 1

Your problem is that the month portion of the Date constructor is 0 -based. (See doc )

month

Integer value representing the month, beginning with 0 for January to 11 for December.

You can see this if you were to construct the date in the JavaScript console:

new Date( 2015 , 10 , 16 )
> Mon Nov 16 2015 00:00:00 GMT-0500 (EST)