| cppreference.com -> Standard C Time & Date |
| asctime() | a textual version of the time |
| clock() | returns the amount of time that the program has been running |
| ctime() | returns a specifically formatted version of the time |
| difftime() | the difference between two times |
| gmtime() | returns a pointer to the current Greenwich Mean Time |
| localtime() | returns a pointer to the current time |
| mktime() | returns the calendar version of a given time |
| strftime() | returns individual elements of the date and time |
| time() | returns the current calendar time of the system |