So I have some code that prints out this and next month's calendar and populates the cells with the day's events. Sometimes, and I can't find root cause except to say that there MUST be a bug in the date() function or the mktime() function because I have a line of code to produce NEXTmonth's month name in text, and it is producing the month TWO months later instead of 1, despite my +1 increment... 

$tyear = date("Y");									// the year - 4 digit
$nyear = date("Y")+1;
$tmonth = date("n");								// the month - no leading 0's
$nmonth = date("n")+1;
$tday = date("j");									// the day as a number

date("F",mktime(0,0,0,$nmonth,$tday,$tyear));

This line can produce not the NEXT month, but TWO months later... Driving me crazy...
-Jeremy