help actually, but is does only part of the job.
It writes the number of seconds passed since midnight UTC (GMT) on 1 january 1970 in a variable of the type "time_t". So you need some way to convert that number to a readable string and print it on stdout.
Here's an example of the, more or less, easiest way to prints the local
(i.e. not UTC/GMT) system time formatted as a human readable string:
Some man pages to read about the other options to format a time-string:
man 2 time
man 3 ctime
man 3 strftime