#include <TimeLib.h>

void setup()
{
  Serial.begin(9600);

  tmElements_t T1;
  tmElements_t T2;

  T1.Hour = 22;
  T1.Minute = 0;
  T1.Second = 0;
  T1.Day = 31;
  T1.Month = 12;
  T1.Year = 2024 - 1970; // because Year is offset from 1970

  T2.Hour = 24;
  T2.Minute = 0;
  T2.Second = 0;
  T2.Day = 32;
  T2.Month = 12;
  T2.Year = 2024 - 1970; // because Year is offset from 1970

  // convert T1 and T2 to seconds since 1/1/1970
  time_t T1sec = makeTime( T1 );
  time_t T2sec = makeTime( T2 );
  Serial.print( "T1 in seconds since 1970: " );
  Serial.println( T1sec );
  Serial.print( "T2 in seconds since 1970: " );
  Serial.println( T2sec );

  // differences in seconds
  int32_t diff = T2sec - T1sec;
  Serial.print( "Difference between T1 and T2 in seconds: " );
  Serial.println( diff );

  // show difference in hours, minutes and seconds
  uint32_t hours = diff / 3600;
  uint8_t minutes = (diff / 60) % 60;
  uint8_t seconds = diff % 60;
  Serial.print( "T1 was " );
  Serial.print( elapsedDays(diff) );
  Serial.print( " days(s), " );
  Serial.print( hours );
  Serial.print( " hour(s), " );
  Serial.print( minutes );
  Serial.print( " minute(s) and " );
  Serial.print( seconds );
  Serial.println( " second(s) before T2." );
  
  breakTime(T2sec, T2);
  Serial.print( "Y:" );
  Serial.println( T2.Year + 1970 );
  Serial.print( "Month:" );
  Serial.println( T2.Month );
  Serial.print( "Day" );
  Serial.println( T2.Day );
  Serial.print( "Hour:" );
  Serial.println( T2.Hour );
  Serial.print( "Minute:" );
  Serial.println( T2.Minute );

}

void loop()
{
}