Question

I would like to check if a given date is the first, second, third, fourth or last monday, tuesday, wednesday,…, sunday in the dates month.

The function should look like this:

if(checkdate(date, "second", "monday"))
{
   alert("This is the second monday of the month");
}
else
{
   alert("This is NOT the second monday of the month");
}

Answer 1

I would rather write a function that returns an object telling me the day and the week-number-in-month of the given date. Something like:

function infoDate(date) {
 return {
  day: date.getDay()+1,
  week: (date.getDate()-1)%7+1
 }
}

Then I can read the returned object and find out if it’s the second monday or whatever:

var info = infoDate(date);
if(info.day==1 && info.week==2) {
  // second monday
}

Of course, you can still write another localized function that does exactly what you ask for based on an array of numeral and day names.