std::chrono::weekday(3)

NAME
std::chrono::weekday - std::chrono::weekday

Synopsis
   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) increments or decrements the weekday
   operator-- (public member function)
   operator--(int)
   operator+= adds or subtracts a number of days
   operator-= (public member function)
   c_encoding retrieves the stored weekday value
   iso_encoding retrieves ISO 8601 weekday value
                   (public member function)
   ok checks if the stored weekday value is valid
                   (public member function)
                   convenience syntax for constructing a weekday_indexed or
   operator[] weekday_last from this weekday
                   (public member function)
   Nonmember functions
   operator== compares two weekday values
   (C++20) (function)
   operator+ performs arithmetic on weekdays
   operator- (function)
   (C++20)
   operator<< outputs a weekday into a stream
   (C++20) (function template)
   from_stream parses a weekday from a stream according to the provided format
   (C++20) (function template)

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

Example
// Run this code
 #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

See also
   weekday_indexed represents the n^th weekday of a month
   (C++20) (class)