#include <fmt/chrono.h>  
#include <spdlog/spdlog.h>  

using namespace std::chrono;  

int main(int argc, char* argv[]) {
  const std::chrono::zoned_time now{locate_zone("America/Chicago"),
                       floor<seconds>(system_clock::now())};
  std::string fmt_result{fmt::format("{:%H:%M %Z %z}", now)};
  std::string std_result{std::format("{:%H:%M %Z %z}", now)};

  spdlog::info("\nfmt_result: {}\nstd_result: {}", fmt_result, std_result);
  return 0;
}