Date Function in Ax 2012

//Date Functions------------------------------------------------------------------
dateMthFwd----> dateMthFwd(fromdate,1)-->to jump next month.
nextMth(fromdate)---> to jump next month.
mkDate(1,mthOfYr(fromdate),year(fromdate))---->To create date.
mthOfYr(fromdate)   ---->To get month in a date.
year(fromdate)      ---->To get year in a date.
noOfMonths = intvNo(16\02\2013, 05\02\2011, intvScale::YearMonth);--->Get no of  Months.
intvNo(dto, dfrom, intvScale::YearMonth) ----->To get no of months in year difference.
intvNo(dto, dfrom, intvScale::Month)     ----->To get no of months.
intvNo(dto, dfrom, intvScale::Year)      ----->To get no of years.

//Get First date Last date------------------------------
date fromdate    = 01\01\2017;
date toDate      = 31\10\2018;
date tempstart = dateStartMth(fromdate);
date tmpEnd    = endMth(fromdate);
do
{
      info(strFmt("StartDate-%1,EndDate:%2",tempstart,tmpEnd));
      tmpEnd    = endmth(nextMth(tmpEnd));
      tempstart =dateStartMth(nextMth(tempstart));
 }
while (tmpEnd <= endmth(toDate));

//Get first Date Last Date---------------------------
date         dfrom    = 18\05\2016;
   date         dto      = 16\12\2017;
   date         dcalc;
   date         firstdate;
   date         lastdate;
   int          noOfMonths;
   int          i;
   dcalc = mkDate(1,mthOfYr(dfrom),year(dfrom));
   noOfMonths = intvNo(dto, dfrom, intvScale::YearMonth);
    for(i=0;i<=noOfMonths;i++)
    {
       firstdate = dcalc;
       dcalc = nextMth(dcalc);
       lastdate = dcalc - 1;
       info(queryValue(firstdate)+"---"+queryValue(lastdate));
    }

// Simple Date functions--------------------------
    TransDate       fromdate;
    TransDate       todate;
    int             noofmnt;
    fromdate = 01\04\2017;
    todate   = 09\10\2018;
    if(fromdate<todate)
    {
        do
        {
            noofmnt =mthOfYr(fromdate);
            info(strFmt("%1-%2--%3",mthName(noofmnt),fromdate,endmth(fromdate)));
            fromdate = nextMth(fromdate);
        }
        while(fromdate<=todate);
    }