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    C Date and time utilities

    From cppreference.net
     
    C++
     
    Date and time library
    Time point
    (C++11)
    (C++20)  
    (C++20)
    Duration
    (C++11)
    Clocks
    (C++11)
    (C++11)
    (C++20)
    (C++20)
    (C++20)
    (C++11)
    (C++20)
    (C++20)
    (C++20)
    Time of day
    (C++20)(C++20)
    (C++20)(C++20)
    (C++20)
    Calendar
    (C++20)
    (C++20)
    (C++20)
    (C++20)
    (C++20)
    (C++20)
    (C++20)
    (C++20)
    (C++20)  
    (C++20)
    (C++20)
    (C++20)
    (C++20)
    (C++20)
    (C++20)
    (C++20)
    (C++20)(C++20)
    chrono I/O
    (C++20)

     
    C-style date and time utilities
    Functions
    Time manipulation
    (C++17)
    (C++26)
    Format conversions
    (deprecated in C++26)
    (deprecated in C++26)
    (C++26)
    (C++26)
    (C++26)
    Constants
    Types
    (C++17)
     

    Functions

    Time manipulation
    Defined in header <ctime>
    		computes the difference between times
    (function)
    		returns the current time of the system as time since epoch
    (function)
    		returns raw processor clock time since the program is started
    (function)
    (C++17)
    		 returns the calendar time in seconds and nanoseconds based on a given time base
    (function)
    (C++26)
    		 returns the resolution of calendar time based on a given time base
    (function)
    Format conversions
    Defined in header <ctime>
    (deprecated in C++26)
    		 converts a std::tm object to a textual representation
    (function)
    (deprecated in C++26)
    		 converts a std::time_t object to a textual representation
    (function)
    		converts a std::tm object to custom textual representation
    (function)
    Defined in header <cwchar>
    		converts a std::tm object to custom wide string textual representation
    (function)
    Defined in header <ctime>
    (C++26)
    		 converts time since epoch to calendar time expressed as Universal Coordinated Time
    (function)
    (C++26)
    		 converts time since epoch to calendar time expressed as local time
    (function)
    		converts calendar time to time since epoch
    (function)
    (C++26)
    		 converts calendar time to time since epoch, ignoring the Daylight Saving Time flag
    (function)

    Constants

    Defined in header <ctime>
    		number of processor clock ticks per second
    (macro constant)

    Types

    Defined in header <ctime>
    		calendar time type
    (class)
    		time since epoch type
    (typedef)
    		process running time
    (typedef)
    (C++17)
    		 time in seconds and nanoseconds
    (struct)

    See also

    C documentation for Date and time utilities