oh ok, I thought they had to be in the libraries folder. So I named the sketch led_example and moved the files like the attachment shows, now I get
enabled in File > Preferences.
Arduino: 1.0.6 (Windows NT (unknown)), Board: "Arduino Nano w/ ATmega328"
In file included from DailyTimer.cpp:29:
DailyTimer.h:80: error: 'time_t' does not name a type
DailyTimer.cpp:32: error: 'nullptr' was not declared in this scope
DailyTimer.cpp: In member function 'void DailyTimer::setDaysActive(EventDays)':
DailyTimer.cpp:79: error: 'time_t' was not declared in this scope
DailyTimer.cpp:79: error: expected `;' before 'now_time'
DailyTimer.cpp:80: error: 'now_time' was not declared in this scope
DailyTimer.cpp:80: error: 'year' was not declared in this scope
DailyTimer.cpp:80: error: 'month' was not declared in this scope
DailyTimer.cpp:80: error: 'day' was not declared in this scope
DailyTimer.cpp:80: error: 'tmConvert_t' was not declared in this scope
DailyTimer.cpp: In member function 'void DailyTimer::setDaysActive(byte)':
DailyTimer.cpp:94: error: 'time_t' was not declared in this scope
DailyTimer.cpp:94: error: expected `;' before 'now_time'
DailyTimer.cpp:95: error: 'now_time' was not declared in this scope
DailyTimer.cpp:95: error: 'year' was not declared in this scope
DailyTimer.cpp:95: error: 'month' was not declared in this scope
DailyTimer.cpp:95: error: 'day' was not declared in this scope
DailyTimer.cpp:95: error: 'tmConvert_t' was not declared in this scope
DailyTimer.cpp: In member function 'uint8_t DailyTimer::setRandomDays(uint8_t)':
DailyTimer.cpp:138: error: 'now' was not declared in this scope
DailyTimer.cpp: In static member function 'static bool DailyTimer::isActive(DailyTimer*)':
DailyTimer.cpp:198: error: 'weekday' was not declared in this scope
DailyTimer.cpp:200: error: 'now' was not declared in this scope
DailyTimer.cpp:217: error: 'time_t' was not declared in this scope
DailyTimer.cpp:217: error: expected `;' before 'now_time'
DailyTimer.cpp:218: error: expected `;' before 'on_time'
DailyTimer.cpp:219: error: expected `;' before 'off_time'
DailyTimer.cpp:220: error: 'now_time' was not declared in this scope
DailyTimer.cpp:220: error: 'weekday' was not declared in this scope
DailyTimer.cpp:228: error: 'on_time' was not declared in this scope
DailyTimer.cpp:228: error: 'off_time' was not declared in this scope
DailyTimer.cpp:251: error: 'on_time' was not declared in this scope
DailyTimer.cpp:251: error: 'off_time' was not declared in this scope
DailyTimer.cpp:262: error: 'off_time' was not declared in this scope
DailyTimer.cpp: At global scope:
DailyTimer.cpp:270: error: 'time_t' does not name a type
