Hi Shahzad,

The tool to convert C to assembler is your compiler, that's what the compiler does. Writing the code in assembler in the first place can be a little more efficient.

Are you sure that its code memory you are running out of? What imediatley stikes me about your code is that you are using a lot of unsigned long variables (4 bytes each) which will take up a lot of data space. See if some of those variables could be unsigned short (2 bytes each) or even single character variables.

A good place to start would be the DaysInPriorMonths variable. Since the maximum value of any element is 31 you could use unsigned chars. Since only February changes I would place two constant tables in the code memory rather than building the table each time the code is run.
e.g.
unsigned char code DaysInLeapYear[] = { 31, 29, 31, 30 ... etc.
unsigned char code DaysInNonLeapYear[] = { 31, 28, 31, 30 ... etc.
You may find this is more efficient in both code and data memory than building the table each time through.

Hope this helps

Paul