Daily bit(e) of C++ | std::chrono — date manipulation

Daily bit(e) of C++ #74, The C++20 date manipulation using std::chrono

C++20 introduced a large extension to the std::chrono library that added (among other things) full support for date representation and manipulation.

#include <chrono>

using namespace std::chrono;

// Day in a year can be specified using literals and operator/
auto christmas_eve = 2023y/December/24d;
// decltype(christmas_eve) == std::chrono::year_moth_day

auto day = weekday{sys_days{christmas_eve}};
// day == Sunday

for (auto date = 2023y/April/1d;
    date.month() == April;
    date = sys_days{date} + days{1}) {
    // iterate over all days in April 2023
}

Open the example in Compiler Explorer.