Function FormatISO8601Date

src/util/time.cpp:100–106

}

std::string FormatISO8601Date(int64_t nTime)
{
    const std::chrono::sys_seconds secs{std::chrono::seconds{nTime}};
    const auto days{std::chrono::floor<std::chrono::days>(secs)};
    const std::chrono::year_month_day ymd{days};
    return strprintf("%04i-%02u-%02u", signed{ymd.year()}, unsigned{ymd.month()}, unsigned{ymd.day()});
}

std::optional<int64_t> ParseISO8601DateTime(std::string_view str)
{