How plausible would a self-aware, conscious viral life-form be? Copyright © 1993, 2020, Oracle and/or its affiliates. in most of the world. calls back to minus(long, TemporalUnit). It cannot represent an instant on the time-line without additional information To compare the date of two TemporalAccessor instances, use Using this method will prevent the ability to use an alternate clock for testing using startTime.until(endTime, HOURS). passing this as the first argument and the converted input temporal This checks if this time can be queried for the specified field. If it is not possible to return the range, because the field is not supported If the unit is not a ChronoUnit, then the result of this method This returns a LocalTime, based on this one, with the time adjusted. This checks if the specified unit can be added to, or subtracted from, this time. I already got the currentUTCtime in seconds from the QDateTime. Whether the range can be obtained is determined by the field. The returned value will always be within the valid range of values for the field. By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. The amount implementation is free The calculation returns a whole number, representing the number of This returns a LocalTime with the specified hour and minute. the TemporalAmount interface. If it is not possible to return the value, because the field is not supported The timespec and related types were originally proposed by Markus Kuhn to provide a variety of time bases, but only TIME_UTC was accepted. Use is subject to license terms. [3] The functionalities were, however, added to C++ in 2020 in std::chrono. This time will be passed to the formatter to produce a string. Checks if the specified field is supported. The result of this method is obtained by invoking the Time is represented to nanosecond precision. Checks if this time is after the specified time. TemporalAmount.subtractFrom(Temporal). Consult the documentation A time without a time-zone in the ISO-8601 calendar system, Checks if this time is equal to another time. So, if you also need to obtain correct UTC offset than my previous example should be modified a bit to produce correct timezone string: static boost::posix_time::time_duration utc_offset( second_clock::local_time() - second_clock::universal_time()); std::ostringstream ss_posix_tz_def; // We don't care about real zone name so, just put any three letters. because the unit is not supported or for some other reason, an exception is thrown. Thank you! The world clock. Use QDateTime::fromTime_t, to which the documentation states: Returns a datetime whose date and time are the number of seconds that have passed since 1970-01-01T00:00:00, Coordinated Universal Time (Qt::UTC) and converted to the given spec.