std::chrono::day

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

The class day represents a day in a month. Its normal range is [ 1 ,  31 ] , but it may hold any number in [​0​, 255]

day is a TriviallyCopyable StandardLayoutType

Member functions

(constructor)	constructs a day (public member function)
operator++operator++(int)operator--operator--(int)	increments or decrements the day (public member function)
operator+=operator-=	adds or subtracts a number of days (public member function)
operator unsigned	retrieves the stored day value (public member function)
ok	checks if the stored day value is in the normal range (public member function)

Nonmember functions

operator==operator<=> (C++20)	compares two day values (function)
operator+operator- (C++20)	adds or subtracts a number of days and a day, or find the difference between two days (function)
operator<< (C++20)	outputs a day into a stream (function template)
from_stream (C++20)	parses a day from a stream according to the provided format (function template)

Helper classes

std::formatter<std::chrono::day> (C++20)	formatting support for day (class template specialization)
std::hash<std::chrono::day> (C++26)	hash support for std::chrono::day (class template specialization)

Literals

Defined in inline namespace std::literals::chrono_literals
operator""d (C++20)	a std::chrono::day literal representing a day of a month (function)