Added time_point to struct tm conversion function.

Examples-and-Recipes.md

@@ -44,6 +44,38 @@ auto min = tod.minutes().count();
 auto s   = tod.seconds().count();
 ```
 
+Alternatively, using `struct tm` to hold the components:
+
+```c++
+template <typename Clock, typename Duration>
+std::tm to_calendar_time(std::chrono::time_point<Clock, Duration> tp)
+{
+    using namespace date;
+    auto date = floor<days>(tp);
+    auto ymd = year_month_day(date);
+    auto weekday = year_month_weekday(date).weekday_indexed().weekday();
+    auto tod = make_time(tp - date);
+    days daysSinceJan1 = date - day_point(ymd.year()/1/1);
+
+    std::tm result;
+    std::memset(&result, 0, sizeof(result));
+    result.tm_sec   = tod.seconds().count();
+    result.tm_min   = tod.minutes().count();
+    result.tm_hour  = tod.hours().count();
+    result.tm_mday  = unsigned(ymd.day());
+    result.tm_mon   = unsigned(ymd.month());
+    result.tm_year  = int(ymd.year()) - 1900;
+    result.tm_wday  = unsigned(weekday);
+    result.tm_yday  = daysSinceJan1.count();
+    result.tm_isdst = -1; // Information not available
+    return result;
+}
+
+auto t = to_calendar_time(std::chrono::system_clock::now());
+std::cout << t.tm_year << "-" << t.tm_mon << "-" << t.tm_day << " ";
+          << t.tm_hour << ":" << t.tm_min << ":" << t.tm_sec << "\n";
+
+```
 ***
 
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