gettimeofday(). is it agnostic for change in day light saving time?

Question

if the system time changes for day light saving time, does the output of gettimeofday() is changed?

Answer 1

Note that Unix systems do not "change the system time" with daylight saving time -- it is all handled when programs want to print the current time, typically using localtime(3).

The seconds since the epoch keep counting monotonically even when local governments decide to change the clocks on our walls.