std::chrono::year_month_day_last::year, std::chrono::year_month_day_last::month, std::chrono::year_month_day_last::day, std::chrono::year_month_day_last::month_day_last

Utilities library
Language support
Type support (basic types, RTTI)
Library feature-test macros (C++20)
Dynamic memory management
Program utilities
Coroutine support (C++20)
Variadic functions
Debugging support
Three-way comparison
General utilities
Date and time
Function objects
Formatting library (C++20)
Relational operators (deprecated in C++20)
Integer comparison functions
Swap and type operations
Common vocabulary types
Elementary string conversions

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)
constexpr std::chrono::month_day_last month_day_last() const noexcept;
(4) (since C++20)

Retrieves the field values stored in this year_month_day_last object.

[edit] Return value

1) Returns the stored std::chrono::year value.
2) Returns the stored std::chrono::month value.
3) A std::chrono::day value corresponding to the last day of the stored year and month. If this->ok() is false, the return value is unspecified.
4) A std::chrono::month_day_last constructed from month().

[edit] Example

#include <chrono>
int main()
    constexpr auto ymdl{std::chrono::last/11/2020};
    ( == std::chrono::day(30) &&
        ymdl.month() == std::chrono::November &&
        ymdl.year() == std::chrono::year(2020) &&
        ymdl.month_day_last() == std::chrono::November/std::chrono::last