```diff + This line should be green on github - This line should be red ! This line might be orange```

diff -This line will appear red(like a deletion) - This line will appear in green(like an addition) + #include <stdio.h> void printCalendar(int year, int month) {

```diff+ This line will showup in green on Github- This line should be red! This might be orange```

{ + int daysInMonth, startDay; } // Array storing number of days in each month (excluding leap years) int days[] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};

// Adjust for leap years
if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0))
    days[1] = 29;

// Calculate the start day of the month using Zeller's Congruence formula
int q = 1; // First day of the month
int m = (month < 3) ? (month + 12) : month;
int y = (month < 3) ? (year - 1) : year;
int h = (q + ((13 * (m + 1)) / 5) + y + (y / 4) - (y / 100) + (y / 400)) % 7;
startDay = (h + 6) % 7; // Adjusting for Sunday-based week

daysInMonth = days[month - 1];

// Print the calendar
printf("\n   Calendar - %d/%d\n", month, year);
printf(" Su Mo Tu We Th Fr Sa\n");

// Print leading spaces
for (int i = 0; i < startDay; i++)
    printf("   ");

// Print dates
for (int day = 1; day <= daysInMonth; day++) {
    printf("%3d", day);
    if ((day + startDay) % 7 == 0)
        printf("\n");
}
printf("\n");

}

int main() { int year, month; printf("Enter year and month (e.g., 2025 5): "); scanf("%d %d", &year, &month);

if (month < 1 || month > 12) {
    printf("Invalid month! Please enter a value between 1 and 12.\n");
    return 1;
}

printCalendar(year, month);
return 0;

}