Defined in header <chrono>  

template< class Clock, class Duration = typename Clock::duration > class time_point;  (since C++11) 
Class template std::chrono::time_point
represents a point in time. It is implemented as if it stores a value of type Duration
indicating the time interval from the start of the Clock
's epoch.
Clock
must meet the requirements for Clock or be std::chrono::local_t
(since C++20).
Member type  Definition 

clock  Clock , the clock on which this time point is measured 
duration  Duration , a std::chrono::duration type used to measure the time since epoch 
rep  Rep , an arithmetic type representing the number of ticks of the duration 
period  Period , a std::ratio type representing the tick period of the duration 
constructs a new time point (public member function) 

returns the time point as duration since the start of its clock (public member function) 

modifies the time point by the given duration (public member function) 

(C++20)  increments or decrements the duration (public member function) 
[static]  returns the time point corresponding to the smallest duration (public static member function) 
[static]  returns the time point corresponding to the largest duration (public static member function) 
specializes the std::common_type trait (class template specialization) 

performs add and subtract operations involving a time point (function template) 

compares two time points (function template) 

converts a time point to another time point on the same clock, with a different duration (function template) 

(C++17)  converts a time_point to another, rounding down (function template) 
(C++17)  converts a time_point to another, rounding up (function template) 
(C++17)  converts a time_point to another, rounding to nearest, ties to even (function template) 
#include <iostream> #include <iomanip> #include <ctime> #include <chrono> int main() { std::chrono::system_clock::time_point now = std::chrono::system_clock::now(); std::time_t now_c = std::chrono::system_clock::to_time_t(now  std::chrono::hours(24)); std::cout << "24 hours ago, the time was " << std::put_time(std::localtime(&now_c), "%F %T") << '\n'; std::chrono::steady_clock::time_point start = std::chrono::steady_clock::now(); std::cout << "Hello World\n"; std::chrono::steady_clock::time_point end = std::chrono::steady_clock::now(); std::cout << "Printing took " << std::chrono::duration_cast<std::chrono::microseconds>(end  start).count() << "us.\n"; }
Possible output:
24 hours ago, the time was 20111025 12:00:08 Hello World Printing took 84us.
(C++11)  a time interval (class template) 
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