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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
setlocale | sets the current locale
strftime | returns individual elements of the date and time
time | returns the current calendar time of the system