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std::chrono::year_month_day::year, std::chrono::year_month_day::month, std::chrono::year_month_day::day

From cppreference.com
 
 
Utilities library
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C-style date and time
 
 
constexpr std::chrono::year year() const noexcept;
(1) (since C++20)
constexpr std::chrono::month month() const noexcept;
(2) (since C++20)
constexpr std::chrono::day day() const noexcept;
(3) (since C++20)

Retrieves the year, month and day values stored in this year_month_day object.

[edit] Return values

1) Returns the stored std::chrono::year value.
2) Returns the stored std::chrono::month value.
3) Returns the stored std::chrono::day value.

[edit] Example

#include <iostream>
#include <chrono>
 
int main()
{
    std::cout << std::boolalpha;
 
    constexpr auto ymd {std::chrono::July/1/2021};
 
    std::cout << (ymd.year() == std::chrono::year(2021)) << ' ';
    std::cout << (ymd.month() == std::chrono::month(7)) << ' ';
    std::cout << (ymd.day() == std::chrono::day(1)) << '\n';
 }

Output:

true true true