std::chrono::year_month - cppreference.com

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std::chrono::year_month

Member functions
year_month::year_month
year_month::yearyear_month::month
year_month::operator+=year_month::operator-=
year_month::ok
Nonmember functions
operator==operator<=>
operator+operator-
operator<<
from_stream
Helper classes
formatter<std::chrono::year_month>
hash<std::chrono::year_month> (C++26)

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Defined in header `<chrono>`
`class year_month;`		(since C++20)

The class year_month represents a specific month of a specific year, but with an unspecified day. It is a field-based time point, with a resolution of std::chrono::months.

year_month is a TriviallyCopyable StandardLayoutType.

Member functions

(constructor)	constructs a `year_month` (public member function) [edit]
yearmonth	accesses the stored year and month (public member function) [edit]
operator+=operator-=	modifies the `year_month` by some number of months or years (public member function) [edit]
ok	checks if this `year_month` is valid (public member function) [edit]

Nonmember functions

operator==operator<=> (C++20)	compares two `year_month` values (function) [edit]
operator+operator- (C++20)	performs arithmetic on `year_month` (function) [edit]
operator<< (C++20)	outputs a `year_month` into a stream (function template) [edit]
from_stream (C++20)	parses a `year_month` from a stream according to the provided format (function template) [edit]

Helper classes

std::formatter<std::chrono::year_month> (C++20)	formatting support for `year_month` (class template specialization) [edit]
std::hash<std::chrono::year_month> (C++26)	hash support for `std::chrono::year_month` (class template specialization)