diff --git a/app/src/main/java/it/danieleverducci/lunatracker/MainActivity.kt b/app/src/main/java/it/danieleverducci/lunatracker/MainActivity.kt
index 1b925e9..b2ea5dc 100644
--- a/app/src/main/java/it/danieleverducci/lunatracker/MainActivity.kt
+++ b/app/src/main/java/it/danieleverducci/lunatracker/MainActivity.kt
@@ -481,15 +481,15 @@ class MainActivity : AppCompatActivity() {
         d.setTitle(event.getDialogTitle(this))
         d.setView(dialogView)
 
-        val durationTextView = dialogView.findViewById<TextView>(R.id.dialog_date_duration)
-        val datePickerBegin = dialogView.findViewById<TextView>(R.id.dialog_date_picker_begin)
-        val datePickerEnd = dialogView.findViewById<TextView>(R.id.dialog_date_picker_end)
-        val dateDelimiter = dialogView.findViewById<TextView>(R.id.dialog_date_range_delimiter)
+        val durationTV = dialogView.findViewById<TextView>(R.id.dialog_date_duration)
+        val datePickerBeginTV = dialogView.findViewById<TextView>(R.id.dialog_date_picker_begin)
+        val datePickerEndTV = dialogView.findViewById<TextView>(R.id.dialog_date_picker_end)
+        val dateDelimiterTV = dialogView.findViewById<TextView>(R.id.dialog_date_range_delimiter)
         val durationButtons = dialogView.findViewById<LinearLayout>(R.id.duration_buttons)
         val durationNowButton = dialogView.findViewById<Button>(R.id.dialog_date_duration_now)
         val durationClearButton = dialogView.findViewById<Button>(R.id.dialog_date_duration_clear)
 
-        val currentDurationTextColor = durationTextView.currentTextColor
+        val currentDurationTextColor = durationTV.currentTextColor
         val invalidDurationTextColor = ContextCompat.getColor(this, R.color.danger)
 
         // in seconds
@@ -506,59 +506,59 @@ class MainActivity : AppCompatActivity() {
         }
 
         fun updateFields() {
-            datePickerBegin.text = DateUtils.formatDateTime(durationStart)
-            datePickerEnd.text = DateUtils.formatDateTime(durationEnd)
+            datePickerBeginTV.text = DateUtils.formatDateTime(durationStart)
+            datePickerEndTV.text = DateUtils.formatDateTime(durationEnd)
 
-            durationTextView.setTextColor(currentDurationTextColor)
+            dateTimePicker(durationStart, datePickerBeginTV) { pickedTime: Long ->
+                durationStart = pickedTime
+                if (datePickerEndTV.visibility == View.GONE) {
+                    durationEnd = pickedTime
+                }
+                updateFields()
+            }
+
+            dateTimePicker(durationEnd, datePickerEndTV) { pickedTime: Long ->
+                durationEnd = pickedTime
+                updateFields()
+            }
+
+            durationTV.setTextColor(currentDurationTextColor)
             val duration = durationEnd - durationStart
             if (duration == 0L) {
                 // event is ongoing
-                durationTextView.text = "💤"
-                dateDelimiter.visibility = View.GONE
-                datePickerEnd.visibility = View.GONE
+                durationTV.text = "💤"
+                dateDelimiterTV.visibility = View.GONE
+                datePickerEndTV.visibility = View.GONE
             } else {
-                durationTextView.text = DateUtils.formatTimeDuration(applicationContext, duration)
+                durationTV.text = DateUtils.formatTimeDuration(applicationContext, duration)
                 if (!isValidTimeSpan(durationStart, durationEnd)) {
-                    durationTextView.setTextColor(invalidDurationTextColor)
+                    durationTV.setTextColor(invalidDurationTextColor)
                 }
-                dateDelimiter.visibility = View.VISIBLE
-                datePickerEnd.visibility = View.VISIBLE
+                dateDelimiterTV.visibility = View.VISIBLE
+                datePickerEndTV.visibility = View.VISIBLE
             }
 
-            datePickerBegin.setTextColor(if (isValidTime(durationStart)) { currentDurationTextColor } else { invalidDurationTextColor })
-            datePickerEnd.setTextColor(if (isValidTime(durationEnd)) { currentDurationTextColor } else { invalidDurationTextColor })
-        }
+            val colorBegin = if (isValidTime(durationStart)) { currentDurationTextColor } else { invalidDurationTextColor }
+            datePickerBeginTV.setTextColor(colorBegin)
 
-        val pickedDateTimeBegin = dateTimePicker(event.time, datePickerBegin) { pickedTime: Long ->
-            durationStart = pickedTime
-            if (datePickerEnd.visibility == View.GONE) {
-                durationEnd = pickedTime
-            }
-            updateFields()
-        }
-
-        val pickedDateTimeEnd = dateTimePicker(event.time + event.quantity, datePickerEnd) { pickedTime: Long ->
-            durationEnd = pickedTime
-            updateFields()
+            val colorEnd = if (isValidTime(durationEnd)) { currentDurationTextColor } else { invalidDurationTextColor }
+            datePickerEndTV.setTextColor(colorEnd)
         }
 
         if (showTime) {
-            dateDelimiter.visibility = View.GONE
-            datePickerEnd.visibility = View.GONE
-            durationTextView.visibility = View.GONE
+            dateDelimiterTV.visibility = View.GONE
+            datePickerEndTV.visibility = View.GONE
+            durationTV.visibility = View.GONE
             durationButtons.visibility = View.GONE
             //d.setMessage("")
         } else {
-            dateDelimiter.visibility = View.VISIBLE
-            datePickerEnd.visibility = View.VISIBLE
-            durationTextView.visibility = View.VISIBLE
+            dateDelimiterTV.visibility = View.VISIBLE
+            datePickerEndTV.visibility = View.VISIBLE
+            durationTV.visibility = View.VISIBLE
             durationButtons.visibility = View.VISIBLE
             d.setMessage(event.getDialogMessage(this))
         }
 
-        durationStart = pickedDateTimeBegin.time.time / 1000
-        durationEnd = pickedDateTimeEnd.time.time / 1000
-
         updateFields()
 
         durationClearButton.setOnClickListener {