DateTime library

Ive downloaded the DateTime library and this is what the structure looks like:

but I get this error when compiling this code:

#include <DateTime.h>
#include <DateTimeStrings.h>

void setup() {
  Serial.begin(9600);

}

void loop() {
    unsigned long prevtime=DateTime.now();
    Serial.println(prevtime);
}

/Users/quique123/Documents/Arduino/libraries/DateTime/DateTime.cpp:15:20: fatal error: wiring.h: No such file or directory
#include <wiring.h>
^
compilation terminated.
exit status 1
Error compiling for board Arduino Nano.

Screen Shot 2017-01-23 at 5.47.30 PM.png

From Arduino Playground - HomePage

This library has been superseded by a newer version that is available here

Use the Time library instead: