Get time as 24 hour format from RTC

I have a DS3231 RTC module.

I would like to get the time from the RTC as 24 hour format not 12 hour. The library that I'm using requires that I pass in 2 Boolean values into Clock.getHour(), however changing these values does not change the returned time format.

Code;

/* DS3231_test.pde Eric Ayars 4/11 Test/demo of read routines for a DS3231 RTC. Turn on the serial monitor after loading this to check if things are working as they should. */ #include <DS3231.h> #include <Wire.h> DS3231 clock; bool century = false; bool h12Flag; bool pmFlag; byte alarmDay, alarmHour, alarmMinute, alarmSecond, alarmBits; bool alarmDy, alarmH12Flag, alarmPmFlag; void setup() { // Start the I2C interface Wire.begin(); // Start the serial interface Serial.begin(57600); } void loop() { // send what's going on to the serial monitor. // Start with the year Serial.print("2"); if (century) { // Won't need this for 89 years. Serial.print("1"); } else { Serial.print("0"); } Serial.print(clock.getYear(), DEC); Serial.print(' '); // then the month Serial.print(clock.getMonth(century), DEC); Serial.print(" "); // then the date Serial.print(clock.getDate(), DEC); Serial.print(" "); // and the day of the week Serial.print(clock.getDoW(), DEC); Serial.print(" "); // Finally the hour, minute, and second Serial.print(clock.getHour(h12Flag, pmFlag), DEC); Serial.print(" "); Serial.print(clock.getMinute(), DEC); Serial.print(" "); Serial.print(clock.getSecond(), DEC); // Add AM/PM indicator if (h12Flag) { if (pmFlag) { Serial.print(" PM "); } else { Serial.print(" AM "); } } else { Serial.print(" 24h "); } // Display the temperature Serial.print("T="); Serial.print(clock.getTemperature(), 2); // Tell whether the time is (likely to be) valid if (clock.oscillatorCheck()) { Serial.print(" O+"); } else { Serial.print(" O-"); } // Indicate whether an alarm went off if (clock.checkIfAlarm(1)) { Serial.print(" A1!"); } if (clock.checkIfAlarm(2)) { Serial.print(" A2!"); } // New line on display Serial.println(); // Display Alarm 1 information Serial.print("Alarm 1: "); clock.getA1Time(alarmDay, alarmHour, alarmMinute, alarmSecond, alarmBits, alarmDy, alarmH12Flag, alarmPmFlag); Serial.print(alarmDay, DEC); if (alarmDy) { Serial.print(" DoW"); } else { Serial.print(" Date"); } Serial.print(' '); Serial.print(alarmHour, DEC); Serial.print(' '); Serial.print(alarmMinute, DEC); Serial.print(' '); Serial.print(alarmSecond, DEC); Serial.print(' '); if (alarmH12Flag) { if (alarmPmFlag) { Serial.print("pm "); } else { Serial.print("am "); } } if (clock.checkAlarmEnabled(1)) { Serial.print("enabled"); } Serial.println(); // Display Alarm 2 information Serial.print("Alarm 2: "); clock.getA2Time(alarmDay, alarmHour, alarmMinute, alarmBits, alarmDy, alarmH12Flag, alarmPmFlag); Serial.print(alarmDay, DEC); if (alarmDy) { Serial.print(" DoW"); } else { Serial.print(" Date"); } Serial.print(" "); Serial.print(alarmHour, DEC); Serial.print(" "); Serial.print(alarmMinute, DEC); Serial.print(" "); if (alarmH12Flag) { if (alarmPmFlag) { Serial.print("pm"); } else { Serial.print("am"); } } if (clock.checkAlarmEnabled(2)) { Serial.print("enabled"); } // display alarm bits Serial.println(); Serial.print("Alarm bits: "); Serial.println(alarmBits, BIN); Serial.println(); delay(1000); } 

How do I make this happen?