# std::chrono::utc_clock::to_sys

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< cpp‎ | chrono‎ | utc clock

template <class Duration> static std::chrono::sys_time<std::common_type_t<Duration, std::chrono::seconds>> to_sys(const std::chrono::utc_time<Duration>& t); |  | (since C++20)

Converts a `utc_time` `t` to a `sys_time` representing the same point in time (if possible).

If `t` represents a time point during a leap second insertion, the last representable value of `sys_time` prior to the insertion of the leap second is returned. In all other cases, utc_clock::from_sys(utc_clock::to_sys(t)) == t.

### Return value

A `sys_time` representing the same point in time as `t`, or the last representable value prior to the insertion of the leap second if `t` represents a time point during a leap second insertion.

### See also

from_sys [static] | converts `sys_time` to `utc_time` (public static member function)
clock_cast (C++20) | convert time points of one clock to another (function template)

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