diff --git a/src/core/sale.cpp b/src/core/sale.cpp
index d15e286..1da00fc 100644
--- a/src/core/sale.cpp
+++ b/src/core/sale.cpp
@@ -8,6 +8,16 @@ void Sale::addArticle(std::shared_ptr<Article> articlePtr)
     articles_.push_back(articlePtr);
 }
 
+std::vector<Article*> Sale::getArticles()
+{
+    std::vector<Article*> articles(articles_.size());
+    for (const auto& article : articles_) {
+        articles.push_back(article.get());
+    }
+
+    return articles;
+}
+
 void Sale::removeArticle(const Article* articlePtr)
 {
     auto it = std::find_if(articles_.begin(), articles_.end(),
@@ -23,4 +33,8 @@ int Sale::sumInCents()
     int sum = std::accumulate(articles_.begin(), articles_.end(), 0,
                               [](int a, std::shared_ptr<Article> b) { return a + b->getPrice(); });
     return sum;
-}
\ No newline at end of file
+}
+
+std::string Sale::getTimestamp() { return timestamp_; }
+
+void Sale::setTimestamp(const std::string& timestamp) { timestamp_ = timestamp; }
\ No newline at end of file
diff --git a/src/core/sale.h b/src/core/sale.h
index 0c38e51..f11f14c 100644
--- a/src/core/sale.h
+++ b/src/core/sale.h
@@ -5,19 +5,25 @@
 
 #include <vector>
 
-#include <boost/date_time.hpp>
+#include "boost/date_time/posix_time/posix_time.hpp"
 
 class Article;
 
 class Sale : public Entity
 {
   public:
-    int sumInCents();
     void addArticle(std::shared_ptr<Article> articlePtr);
+    void setTimestamp(const std::string& timestamp);
+
+    std::vector<Article*> getArticles();
+    std::string getTimestamp();
+    int sumInCents();
+
     void removeArticle(const Article* articlePtr);
 
   private:
-    boost::posix_time::ptime systemTime_{boost::posix_time::second_clock::local_time()};
+    std::string timestamp_{
+        boost::posix_time::to_iso_extended_string(boost::posix_time::second_clock::local_time())};
     std::vector<std::shared_ptr<Article>> articles_{};
 };