finale version

src/Co2Data.java

@@ -16,7 +16,7 @@ public class Co2Data {
     public Co2Data(Date date, int co2Level) {
         this.date = date;
         this.co2Level = co2Level;
-        this.time = date.getHour() * 100 + date.getMinute();
+        this.time = (date.getHour() * 100 + 100) + date.getMinute();
     }
 
     // #region Getters and Setters

src/Date.java

@@ -72,6 +72,7 @@ public class Date {
 
     // #region String Representation
     // Method to print date in a readable format
+    @Override
     public String toString() {
         return String.format("%04d-%02d-%02d %02d:%02d", year, month, day, hour, minute);
     }