# std::chrono::operator<< (std::chrono::sys_time)

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< cpp‎ | chrono‎ | system clock

template <class CharT, class Traits, class Duration> std::basic_ostream<CharT, Traits>& operator<<(std::basic_ostream<CharT, Traits>& os, const std::chrono::sys_time<Duration>& tp); | (1) | (since C++20)
template <class CharT, class Traits, class Duration> std::basic_ostream<CharT, Traits>& operator<<(std::basic_ostream<CharT, Traits>& os, const std::chrono::sys_days& tp); | (2) | (since C++20)

Outputs `tp` into the stream `os`.

1) Equivalent to:

    auto const dp = std::chrono::floor<std::chrono::days>(tp);
    os << std::chrono::year_month_day(dp) << ' ' << std::chrono::time_of_day(tp - dp);

This overload only participates in overload resolution if std::chrono::treat_as_floating_point_v<typename Duration::rep> is false and Duration(1) < std::chrono::days(1).
2) Equivalent to os << std::chrono::year_month_day(tp);

### Return value

`os`.

### See also

to_stream (std::chrono::sys_time) (C++20) | outputs a sys_time into a stream according to the provided format (function template)
operator<< | outputs a `year_month_day` into a stream (function template)

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