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Convert days to Years, Weeks, Days Program in C

Introduction

In many real-life applications (like HR systems, leave management, or project tracking), we need to convert a large number of days into years, weeks, and remaining days.

• We assume:
• 1 Year = 365 Days (ignoring leap years for simplicity)
• 1 Week = 7 Days

Formula:

• years = days / 365
• weeks = (days % 365) / 7
• days_left = (days % 365) % 7

C Program: Convert days to Years, Weeks, Days

#include <stdio.h>
 
int main() {
    int total_days, years, weeks, days_left;
 
    // Input total number of days
    printf("Enter total number of days: ");
    scanf("%d", &total_days);
 
    // Conversion logic
    years = total_days / 365;               // Get years
    weeks = (total_days % 365) / 7;         // Get weeks from remaining days
    days_left = (total_days % 365) % 7;     // Remaining days
 
    // Display result
    printf("\n%d days = %d year(s), %d week(s), and %d day(s)\n",
           total_days, years, weeks, days_left);
 
    return 0;
}
    

 
OUTPUT :
Enter total number of days: 1329

1329 days = 3 year(s), 33 week(s), and 3 day(s)

Explanation

1. Input total number of days from user.
2. Divide by 365 to get number of years.
3. Use modulo (%) to get remaining days after years.
4. From those remaining days:
   • Divide by 7 → number of weeks.
   • Modulo 7 → leftover days.
5. Print the converted result.