user27726: I want to know if it is possible to set an alarm in DS3231.
I want to set the alarm every 6 AM in the morning. Is this possible? 

user31105: Yes it is (see datasheet datasheet) ... the DS3231 has 2 alarms.
There is also a library for the Arduino, see: library.
The alarm(s) can be set (repeatedly) via one of the following functions:
Alarm.alarmRepeat(hours, minutes, seconds, function); 
Create an alarm that will call a function every day at a particular time. 

Alarm.alarmRepeat(dayofweek, hours, minutes, seconds, function); 
Create an alarm that will call a function every week on a specific day at     
a particular time.

 "dayofweek" can be dowSunday, dowMonday, dowTuesday, dowWednesday,
 dowThursday, dowFriday, or dowSaturday. 

Detailed info and more functions: link

27726: <p>I want to know if it is possible to set an alarm in DS3231.
I want to set the alarm every 6 AM in the morning. Is this possible? </p>
 31105: <p>Yes it is (see datasheet <a href="https://datasheets.maximintegrated.com/en/ds/DS3231.pdf" rel="nofollow noreferrer">datasheet</a>) ... the DS3231 has 2 alarms.</p>

<p>There is also a library for the Arduino, see: <a href="http://playground.arduino.cc/Code/Time" rel="nofollow noreferrer">library</a>.
The alarm(s) can be set (repeatedly) via one of the following functions:</p>

<pre><code>Alarm.alarmRepeat(hours, minutes, seconds, function); 
Create an alarm that will call a function every day at a particular time. 

Alarm.alarmRepeat(dayofweek, hours, minutes, seconds, function); 
Create an alarm that will call a function every week on a specific day at     
a particular time.

 "dayofweek" can be dowSunday, dowMonday, dowTuesday, dowWednesday,
 dowThursday, dowFriday, or dowSaturday. 
</code></pre>

<p>Detailed info and more functions: <a href="https://www.pjrc.com/teensy/td_libs_TimeAlarms.html" rel="nofollow noreferrer">link</a></p>
