Date.getDay() not returning 0 for Sunday???

[michaelmakuch]

The docs say that Date.getDay() returns the day of the week where 0 == Sunday. I am getting a 0 for Thursday and Friday, intermittently with this efs script;

// Day of week

function preMain() {
setStudyTitle("Day of week");
setComputeOnClose();
return;
}
function main( ) {

var yr = getYear(0);
var mon = getMonth(0);
var dom = getDay(0);
var hour = getHour(0);
var min = getMinute(0);
var sec = getSecond(0);
var bdate = new Date(yr, mon, dom, hour, min, sec);
var dow = bdate.getDay();
var msg = yr + "/" + mon + "/" + dom + " " + hour + ":" + min + ":" + sec + " " + dow;
log(msg);

return 0;
}
function preMain() {
setStudyTitle("Day of week");
setComputeOnClose();
return;
}

function log(msg) {
var logfile = new File("dow.log"); //the file will be created in: eSignal/FormulaOutput/
logfile.open("at+"); // Opens and appends the file
if(!logfile.isOpen()) {
debugPrintln("Could not open file!");
} else {
logfile.writeln(msg);
debugPrintln(msg);
}
logfile.close();
}

And here's the output;

2007/3/1 0:0:0 0
2007/3/2 0:0:0 1
2007/3/5 0:0:0 4
2007/3/6 0:0:0 5
2007/3/7 0:0:0 6
2007/3/8 0:0:0 0
2007/3/9 0:0:0 1
2007/3/12 0:0:0 4
2007/3/13 0:0:0 5
2007/3/14 0:0:0 6
2007/3/15 0:0:0 0
2007/3/16 0:0:0 1
2007/3/19 0:0:0 4
2007/3/20 0:0:0 5
2007/3/21 0:0:0 6
2007/3/22 0:0:0 0
2007/3/23 0:0:0 1
2007/3/26 0:0:0 4
2007/3/27 0:0:0 5
2007/3/28 0:0:0 6
2007/3/29 0:0:0 0
2007/3/30 0:0:0 1
2007/4/2 0:0:0 3
2007/4/3 0:0:0 4
2007/4/4 0:0:0 5
2007/4/5 0:0:0 6
2007/4/9 0:0:0 3
2007/4/10 0:0:0 4
2007/4/11 0:0:0 5
2007/4/12 0:0:0 6
2007/4/13 0:0:0 0
2007/4/16 0:0:0 3
2007/4/17 0:0:0 4
2007/4/18 0:0:0 5
2007/4/19 0:0:0 6
2007/4/20 0:0:0 0
2007/4/23 0:0:0 3
2007/4/24 0:0:0 4
2007/4/25 0:0:0 5
2007/4/26 0:0:0 6
2007/4/27 0:0:0 0
2007/4/30 0:0:0 3
2007/5/1 0:0:0 5
2007/5/2 0:0:0 6
2007/5/3 0:0:0 0
2007/5/4 0:0:0 1

Am I missing something here or is the Date.getDay() not working correctly?

Thanks,
Mike

[michaelmakuch]

Got it

The JS Date uses months 0-11 where as efs uses months 1-12.

Good grief.