diff --git a/src/main/kotlin/io/github/wulkanowy/api/attendance/AttendanceResponse.kt b/src/main/kotlin/io/github/wulkanowy/api/attendance/AttendanceResponse.kt
index 5467fc71..c9f2e975 100644
--- a/src/main/kotlin/io/github/wulkanowy/api/attendance/AttendanceResponse.kt
+++ b/src/main/kotlin/io/github/wulkanowy/api/attendance/AttendanceResponse.kt
@@ -7,7 +7,7 @@ import java.util.*
 
 class AttendanceResponse {
 
-    @Selector(".presentData thead th:not(:first-of-type)", regex = "\\s(.*)")
+    @Selector(".presentData thead th:not(:first-of-type)", regex = "\\s(.*)", defValue = "01.01.1970")
     @Format("dd.MM.yyyy")
     var days: List<Date> = emptyList()
 
diff --git a/src/main/kotlin/io/github/wulkanowy/api/exams/Exam.kt b/src/main/kotlin/io/github/wulkanowy/api/exams/Exam.kt
index e83fb615..a07eebb2 100644
--- a/src/main/kotlin/io/github/wulkanowy/api/exams/Exam.kt
+++ b/src/main/kotlin/io/github/wulkanowy/api/exams/Exam.kt
@@ -11,7 +11,7 @@ class Exam {
 
     @SerializedName("DataModyfikacji")
     @Format("dd.MM.yyyy")
-    @Selector(".wartosc", index = 3, regex = ".+, (.+)")
+    @Selector(".wartosc", index = 3, regex = ".+, (.+)", defValue = "01.01.1970")
     lateinit var entryDate: Date
 
     @SerializedName("DisplayValue")
diff --git a/src/main/kotlin/io/github/wulkanowy/api/exams/ExamResponse.kt b/src/main/kotlin/io/github/wulkanowy/api/exams/ExamResponse.kt
index 66a97295..7a2f5bcf 100644
--- a/src/main/kotlin/io/github/wulkanowy/api/exams/ExamResponse.kt
+++ b/src/main/kotlin/io/github/wulkanowy/api/exams/ExamResponse.kt
@@ -17,7 +17,7 @@ class ExamResponse {
 
         @SerializedName("Data")
         @Format("dd.MM.yyyy")
-        @Selector("h2", regex = ".+, (.+)")
+        @Selector("h2", regex = ".+, (.+)", defValue = "01.01.1970")
         lateinit var date: Date
 
         @SerializedName("Sprawdziany")
diff --git a/src/main/kotlin/io/github/wulkanowy/api/homework/Homework.kt b/src/main/kotlin/io/github/wulkanowy/api/homework/Homework.kt
index 3d03e914..94059b40 100644
--- a/src/main/kotlin/io/github/wulkanowy/api/homework/Homework.kt
+++ b/src/main/kotlin/io/github/wulkanowy/api/homework/Homework.kt
@@ -11,7 +11,7 @@ class Homework {
 
     @SerializedName("DataModyfikacji")
     @Format("dd.MM.yyyy")
-    @Selector(".wartosc", index = 2, regex = ".+, (.+)")
+    @Selector(".wartosc", index = 2, regex = ".+, (.+)", defValue = "01.01.1970")
     lateinit var entryDate: Date
 
     @SerializedName("Przedmiot")
diff --git a/src/main/kotlin/io/github/wulkanowy/api/homework/HomeworkResponse.kt b/src/main/kotlin/io/github/wulkanowy/api/homework/HomeworkResponse.kt
index c577db66..bae0ac22 100644
--- a/src/main/kotlin/io/github/wulkanowy/api/homework/HomeworkResponse.kt
+++ b/src/main/kotlin/io/github/wulkanowy/api/homework/HomeworkResponse.kt
@@ -9,7 +9,7 @@ class HomeworkResponse {
 
     @SerializedName("Data")
     @Format("dd.MM.yyyy")
-    @Selector(".mainContainer h2:not(:contains(Brak))", regex = "\\s(.*)")
+    @Selector(".mainContainer h2:not(:contains(Brak))", regex = "\\s(.*)", defValue = "01.01.1970")
     lateinit var date: Date
 
     @SerializedName("ZadaniaDomowe")
diff --git a/src/main/kotlin/io/github/wulkanowy/api/mobile/Device.kt b/src/main/kotlin/io/github/wulkanowy/api/mobile/Device.kt
index f9e80696..8b1e06b0 100644
--- a/src/main/kotlin/io/github/wulkanowy/api/mobile/Device.kt
+++ b/src/main/kotlin/io/github/wulkanowy/api/mobile/Device.kt
@@ -17,6 +17,6 @@ class Device {
 
     @SerializedName("DataUtworzenia")
     @Format(value = "dd.MM.yyyy 'godz:' HH:mm:ss")
-    @Selector("td", index = 1)
+    @Selector("td", index = 1, defValue = "01.01.1970")
     lateinit var date: Date
 }
diff --git a/src/main/kotlin/io/github/wulkanowy/api/notes/NotesResponse.kt b/src/main/kotlin/io/github/wulkanowy/api/notes/NotesResponse.kt
index 62a348af..3842e962 100644
--- a/src/main/kotlin/io/github/wulkanowy/api/notes/NotesResponse.kt
+++ b/src/main/kotlin/io/github/wulkanowy/api/notes/NotesResponse.kt
@@ -12,6 +12,6 @@ class NotesResponse {
     var notes: List<Note> = listOf()
 
     @Format("dd.MM.yyyy")
-    @Selector(".mainContainer div:first-of-type h2:not(:contains(Brak))")
+    @Selector(".mainContainer div:first-of-type h2:not(:contains(Brak))", defValue = "01.01.1970")
     var dates: List<Date> = listOf()
 }
diff --git a/src/main/kotlin/io/github/wulkanowy/api/timetable/TimetableResponse.kt b/src/main/kotlin/io/github/wulkanowy/api/timetable/TimetableResponse.kt
index 49dd4143..95f3f152 100644
--- a/src/main/kotlin/io/github/wulkanowy/api/timetable/TimetableResponse.kt
+++ b/src/main/kotlin/io/github/wulkanowy/api/timetable/TimetableResponse.kt
@@ -8,7 +8,7 @@ import java.util.*
 
 class TimetableResponse {
 
-    @Selector(".presentData thead th:not(:nth-of-type(1)):not(:nth-of-type(2))", regex = "\\s(.*)")
+    @Selector(".presentData thead th:not(:nth-of-type(1)):not(:nth-of-type(2))", regex = "\\s(.*)", defValue = "01.01.1970")
     @Format("dd.MM.yyyy")
     var days: List<Date> = emptyList()