std::chrono::time_point::max(3)

NAME
std::chrono::time_point::max - std::chrono::time_point::max

Synopsis
   static constexpr time_point max(); (until C++20)
   static constexpr time_point max() noexcept; (since C++20)
   Returns a time_point with the largest possible duration, i.e.
   time_point(std::chrono::duration::max()).

Parameters
   (none)

Return value
   The largest possible time_point.

Example
// Run this code
 #include <chrono>
 #include <iostream>
 #include <vector>
 int main()
 {
     std::chrono::time_point<std::chrono::system_clock> now =
         std::chrono::system_clock::now();
     std::vector<std::chrono::time_point<std::chrono::system_clock>> times
     {
         now - std::chrono::hours(24),
         now - std::chrono::hours(48),
         now + std::chrono::hours(24)
     };
     std::chrono::time_point<std::chrono::system_clock> earliest =
         std::chrono::time_point<std::chrono::system_clock>::max();
     std::cout << "all times:\n";
     for (const auto& time : times)
     {
         std::time_t t = std::chrono::system_clock::to_time_t(time);
         std::cout << std::ctime(&t);
         if (time < earliest)
             earliest = time;
     }
     std::time_t t = std::chrono::system_clock::to_time_t(earliest);
     std::cout << "earliest:\n" << std::ctime(&t);
 }

Possible output:
 all times:
 Sun Oct 7 19:06:48 2012
 Sat Oct 6 19:06:48 2012
 Tue Oct 9 19:06:48 2012
 earliest:
 Sat Oct 6 19:06:48 2012