std::chrono::weekday

Defined in header `<chrono>`
class weekday;		(since C++20)
inline constexpr std::chrono::weekday Sunday{0};		(since C++20)
inline constexpr std::chrono::weekday Monday{1};		(since C++20)
inline constexpr std::chrono::weekday Tuesday{2};		(since C++20)
inline constexpr std::chrono::weekday Wednesday{3};		(since C++20)
inline constexpr std::chrono::weekday Thursday{4};		(since C++20)
inline constexpr std::chrono::weekday Friday{5};		(since C++20)
inline constexpr std::chrono::weekday Saturday{6};		(since C++20)

The class weekday represent a day of the week in the proleptic Gregorian calendar. Its normal range is [0, 6], for Sunday through Saturday, but it can hold any value in the range [0, 255]. Seven named constants are predefined in the std::chrono namespace for the seven days of the week.

weekday is a TriviallyCopyable StandardLayoutType.

Member functions

(constructor)	constructs a `weekday` (public member function)
operator++operator++(int)operator--operator--(int)	increments or decrements the weekday (public member function)
operator+=operator-=	adds or subtracts a number of days (public member function)
c_encodingiso_encoding	retrieves the stored weekday value retrieves ISO 8601 weekday value (public member function)
ok	checks if the stored weekday value is valid (public member function)
operator[]	convenience syntax for constructing a `weekday_indexed` or `weekday_last` from this `weekday` (public member function)

Nonmember functions

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

Helper classes

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

Example

#include <chrono>
#include <iostream>
 
int main()
{
    std::chrono::weekday x{42 / 13};
    std::cout << x++ << '\n';
    std::cout << x << '\n';
    std::cout << ++x << '\n';
}

Output:

Wed
Thu
Fri

std::chrono::weekday

Member functions

Nonmember functions

Helper classes

Example

See also