C++20 adds the timezone/caldendaring/formatting from Howard Hinnat’s Date Library https://github.com/howardhinnant/date https://github.com/howardhinnant/date .

C++20 adds the timezone/caldendaring/formatting from Howard Hinnat’s Date Library https://github.com/howardhinnant/date https://github.com/howardhinnant/date . So calendrical calculations and time zone support.