Updated Boost datetime Examples Translated (markdown)

Boost-datetime-Examples-Translated.md

@@ -432,23 +432,23 @@ main()
 ```
 <a name="Time_Periods"></a>
 ### Time Periods
+```c++
+#include "date.h"
+#include <iostream>
 
-    #include "date.h"
+int
-    #include <iostream>
+main()
-
+{
-    int
-    main()
-    {
     using namespace std::chrono;
     using namespace date;
-        auto d = sys_days(2002_y/feb/1);  // an arbitrary date
+    auto d = sys_days{2002_y/feb/1};  // an arbitrary date
     auto t = d + 3h + 5s;              //an arbitray time on that day
     if (d <= t && t < d + days{1})
         std::cout << d << " contains " << t << '\n';
     // Time periods not part of this library but can be built
     //   from a pair of time_points.
-    }
+}
-
+```
 <a name="Simple_Time_Zones"></a>
 ### Simple Time Zones