To compute the number of milliseconds per day, you can use the following snippets:
Java
final long millisecondsPerDay = 24 /*hours*/ * 60 /*minutes*/ * 60 /*seconds*/ * 1000 /*milliseconds*/;
C/C++
const unsigned long millisecondsPerDay = 24 /*hours*/ * 60 /*minutes*/ * 60 /*seconds*/ * 1000 /*milliseconds*/;
This post is also available in: Greek