Answer :
1:00 AM (Date: n/m/y)
(-2 hours) ----> 11:00 PM (Date: n-1/m/y)
(-30 minutes) ----> 10:30 PM (Date: n-1/m/y)
-----------
{2≤n≤28}
(-2 hours) ----> 11:00 PM (Date: n-1/m/y)
(-30 minutes) ----> 10:30 PM (Date: n-1/m/y)
-----------
{2≤n≤28}