From 41394ea4067b42e34985e4360309120ec5a643e6 Mon Sep 17 00:00:00 2001
From: Howard Hinnant <howard.hinnant@gmail.com>
Date: Sun, 26 Apr 2020 14:21:17 -0400
Subject: [PATCH] Updated Examples and Recipes (markdown)

---
 Examples-and-Recipes.md | 20 ++++++--------------
 1 file changed, 6 insertions(+), 14 deletions(-)

diff --git a/Examples-and-Recipes.md b/Examples-and-Recipes.md
index 6eda81d..c9a0fed 100644
--- a/Examples-and-Recipes.md
+++ b/Examples-and-Recipes.md
@@ -1733,7 +1733,7 @@ FILETIME system_clock_to_FILETIME(system_clock::time_point systemPoint) {
 
 ```c++
 #include "boost/date_time/posix_time/posix_time.hpp"
-#include "date/date.h"
+#include <chrono>
 
 std::chrono::system_clock::time_point
 to_system_clock(boost::posix_time::ptime const& pt)
@@ -1752,23 +1752,15 @@ to_system_clock(boost::posix_time::ptime const& pt)
 boost::posix_time::ptime
 to_ptime(std::chrono::system_clock::time_point const& st)
 {
-    using namespace date;
     using namespace std::chrono;
-    auto sd = floor<days>(st);
-    year_month_day ymd = sd;
-    hh_mm_ss<system_clock::duration> hms{st - sd};
-    auto y = int(ymd.year());
-    auto m = unsigned(ymd.month());
-    auto d = unsigned(ymd.day());
-    auto h = hms.hours().count();
-    auto M = hms.minutes().count();
-    auto s = hms.seconds().count();
+    using namespace boost;
 #ifdef BOOST_DATE_TIME_HAS_NANOSECONDS
-    auto fs = nanoseconds(hms.subseconds()).count();
+    posix_time::nanoseconds fs{nanoseconds{st.time_since_epoch()}.count()};
 #else
-    auto fs = duration_cast<microseconds>(hms.subseconds()).count();
+    posix_time::microseconds fs{duration_cast<microseconds>(
+                                           st.time_since_epoch()).count()};
 #endif
-    return {{y, m, d}, {h, M, s, fs}};
+    return posix_time::from_time_t(0) + fs;
 }
 ```