diff --git a/chrono/datetime.h b/chrono/datetime.h
index 857c76d..43cf7a4 100644
--- a/chrono/datetime.h
+++ b/chrono/datetime.h
@@ -64,6 +64,7 @@ public:
     static DateTime fromTimeStamp(time_t timeStamp);
     static DateTime fromTimeStampGmt(time_t timeStamp);
 
+    uint64 &ticks();
     constexpr uint64 totalTicks() const;
     int year() const;
     int month() const;
@@ -212,6 +213,14 @@ inline DateTime DateTime::fromIsoStringLocal(const char *str)
     return fromIsoString(str).first;
 }
 
+/*!
+ * \brief Returns a mutable reference to the total ticks.
+ */
+inline uint64 &DateTime::ticks()
+{
+    return m_ticks;
+}
+
 /*!
  * \brief Returns the number of ticks which represent the value of the current instance.
  */
diff --git a/chrono/timespan.h b/chrono/timespan.h
index 04a2fc4..9ac0720 100644
--- a/chrono/timespan.h
+++ b/chrono/timespan.h
@@ -42,6 +42,7 @@ public:
     static constexpr TimeSpan negativeInfinity();
     static constexpr TimeSpan infinity();
 
+    int64 &ticks();
     constexpr int64 totalTicks() const;
     constexpr double totalMicroseconds() const;
     constexpr double totalMilliseconds() const;
@@ -181,6 +182,14 @@ constexpr inline TimeSpan TimeSpan::infinity()
     return TimeSpan(std::numeric_limits<decltype(m_ticks)>::max());
 }
 
+/*!
+ * \brief Returns a mutable reference to the total ticks.
+ */
+inline int64 &TimeSpan::ticks()
+{
+    return m_ticks;
+}
+
 /*!
  * \brief Returns the number of ticks that represent the value of the current TimeSpan class.
  */