# std::chrono::year_month_weekday::year_month_weekday

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< cpp‎ | chrono‎ | year month weekday

year_month_weekday() = default; | (1) | (since C++20)
constexpr year_month_weekday(const std::chrono::year& y, const std::chrono::month& m, const std::chrono::weekday_indexed& wdi) noexcept; | (2) | (since C++20)
constexpr year_month_weekday(const std::chrono::sys_days& dp) noexcept; | (3) | (since C++20)
explicit constexpr year_month_weekday(const std::chrono::local_days& dp) noexcept; | (4) | (since C++20)

Constructs a `year_month_weekday` object.

1) Default constructor leaves the fields uninitialized.
2) Constructs a `year_month_weekday` object storing the year `y`, the month `m`, the weekday `wdi.weekday()` and the weekday index `wdi.index()`.
3) Constructs a `year_month_weekday` object corresponding to the date represented by `dp`. For any `year_month_weekday` object storing a valid date, converting it to `sys_days` and back yields the same value. This constructor defines an implicit conversion from `sys_days` to `year_month_weekday`.
4) Constructs a `year_month_weekday` object corresponding to the date represented by `dp`. Equivalent to year_month_weekday(sys_days(dp.time_since_epoch())).

### Notes

A `year_month_weekday` can also be created by combining one of the partial-date types std::chrono::year_month and std::chrono::month_weekday with the missing component (indexed weekday and year, respectively) using `operator/`.

### See also

operator/ (C++20) | conventional syntax for Gregorian calendar date creation (function)

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