account as well as whether each clock keeps track of leap seconds. Internally, uses clock_time_conversions which each use to_utc, from_utc, to_sys, and from_sys as needed.25 Part IV: Leap Seconds26 What time zone). • Can produce the local_time or equivalent sys_time39 sys_time and local_time conversions • NOTE: • template using sys_time = time_point; • template using local_time = time_point; Conversions between sys_time and local_time are usually uncontroversial, but there are a few cases where things get tricky

duration d2 { d1 }; cout << d2.count() << " seconds"; // 600 seconds26 Time Points  Implicit conversions  Example: seconds -> milliseconds time_point tpSeconds { 42s }; // Convert << tpMilliseconds.time_since_epoch().count() << "ms"; // 42000ms27 Time Points  Explicit conversions  Example: milliseconds -> seconds time_point tpMilliseconds { 42’016ms

C++20 Features: 60  23 Left6 C++20 STL Features Part 17 Comparing Integers8 Usual Arithmetic Conversions #include using namespace std; int main() { cout << boolalpha; short s