diff --git a/calendar.test.js b/calendar.test.js
index 7b15de9..a3f1aed 100644
--- a/calendar.test.js
+++ b/calendar.test.js
@@ -36,6 +36,10 @@ describe('Calendar Merging API', () => {
         return path.join(__dirname, TEST_CALENDARS_DIR, filename);
     };
 
+    const loadExpectedOutput = (filename) => {
+        return fs.readFileSync(path.join(EXPECTED_OUTPUTS_DIR, filename), 'utf8');
+    };
+
     test('Merge date-based calendar', async () => {
         const response = await request(server)
             .post('/merge')
diff --git a/temp_test_calendar/Date_Based_Calendar.ics b/temp_test_calendar/Date_Based_Calendar.ics
new file mode 100644
index 0000000..8ccad47
--- /dev/null
+++ b/temp_test_calendar/Date_Based_Calendar.ics
@@ -0,0 +1,336 @@
+BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//sebbo.net//ical-generator//EN
+NAME:Date Based Calendar
+X-WR-CALNAME:Date Based Calendar
+BEGIN:VEVENT
+UID:inx8@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20230219
+DTEND;VALUE=DATE:20230224
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:Ferien_Bayern_2023 Winterferien 2023 Bayern
+END:VEVENT
+BEGIN:VEVENT
+UID:x4p6@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20230402
+DTEND;VALUE=DATE:20230415
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:Ferien_Bayern_2023 Osterferien 2023 Bayern
+END:VEVENT
+BEGIN:VEVENT
+UID:ffjf@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20230529
+DTEND;VALUE=DATE:20230609
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:Ferien_Bayern_2023 Pfingstferien 2023 Bayern
+END:VEVENT
+BEGIN:VEVENT
+UID:dazk@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20230730
+DTEND;VALUE=DATE:20230911
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:Ferien_Bayern_2023 Sommerferien 2023 Bayern
+END:VEVENT
+BEGIN:VEVENT
+UID:tqry@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20231029
+DTEND;VALUE=DATE:20231103
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:Ferien_Bayern_2023 Herbstferien 2023 Bayern
+END:VEVENT
+BEGIN:VEVENT
+UID:o8nw@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20231121
+DTEND;VALUE=DATE:20231122
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:Ferien_Bayern_2023 Herbstferien 2023 Bayern
+END:VEVENT
+BEGIN:VEVENT
+UID:4cmg@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20231222
+DTEND;VALUE=DATE:20240105
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:Ferien_Bayern_2023 Weihnachtsferien 2023 Bayern
+END:VEVENT
+BEGIN:VEVENT
+UID:lc6g@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20231231
+DTEND;VALUE=DATE:20231231
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:US_holidays New Year's Day
+END:VEVENT
+BEGIN:VEVENT
+UID:4iq1@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20240114
+DTEND;VALUE=DATE:20240114
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:US_holidays M L King Day
+END:VEVENT
+BEGIN:VEVENT
+UID:fdhn@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20240218
+DTEND;VALUE=DATE:20240218
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:US_holidays Presidents' Day
+END:VEVENT
+BEGIN:VEVENT
+UID:aa7e@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20240328
+DTEND;VALUE=DATE:20240328
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:US_holidays Good Friday
+END:VEVENT
+BEGIN:VEVENT
+UID:l4wg@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20240330
+DTEND;VALUE=DATE:20240330
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:US_holidays Easter Sunday
+END:VEVENT
+BEGIN:VEVENT
+UID:d6sk@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20240526
+DTEND;VALUE=DATE:20240526
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:US_holidays Memorial Day
+END:VEVENT
+BEGIN:VEVENT
+UID:6cb0@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20240618
+DTEND;VALUE=DATE:20240618
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:US_holidays Juneteenth
+END:VEVENT
+BEGIN:VEVENT
+UID:j0u6@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20240703
+DTEND;VALUE=DATE:20240703
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:US_holidays Independence Day
+END:VEVENT
+BEGIN:VEVENT
+UID:4zxl@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20240901
+DTEND;VALUE=DATE:20240901
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:US_holidays Labor Day
+END:VEVENT
+BEGIN:VEVENT
+UID:s66c@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20241013
+DTEND;VALUE=DATE:20241013
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:US_holidays Columbus Day
+END:VEVENT
+BEGIN:VEVENT
+UID:02ro@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20241110
+DTEND;VALUE=DATE:20241110
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:US_holidays Veterans Day
+END:VEVENT
+BEGIN:VEVENT
+UID:zpq0@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20241127
+DTEND;VALUE=DATE:20241127
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:US_holidays Thanksgiving Day
+END:VEVENT
+BEGIN:VEVENT
+UID:p8nj@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20241224
+DTEND;VALUE=DATE:20241224
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:US_holidays Christmas
+END:VEVENT
+BEGIN:VEVENT
+UID:moif@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20241231
+DTEND;VALUE=DATE:20241231
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:US_holidays New Year's Day
+END:VEVENT
+BEGIN:VEVENT
+UID:idam@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20250119
+DTEND;VALUE=DATE:20250119
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:US_holidays M L King Day
+END:VEVENT
+BEGIN:VEVENT
+UID:hhyv@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20250216
+DTEND;VALUE=DATE:20250216
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:US_holidays Presidents' Day
+END:VEVENT
+BEGIN:VEVENT
+UID:rbcm@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20250417
+DTEND;VALUE=DATE:20250417
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:US_holidays Good Friday
+END:VEVENT
+BEGIN:VEVENT
+UID:0yq5@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20250419
+DTEND;VALUE=DATE:20250419
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:US_holidays Easter Sunday
+END:VEVENT
+BEGIN:VEVENT
+UID:j15g@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20250525
+DTEND;VALUE=DATE:20250525
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:US_holidays Memorial Day
+END:VEVENT
+BEGIN:VEVENT
+UID:yb2g@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20250618
+DTEND;VALUE=DATE:20250618
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:US_holidays Juneteenth
+END:VEVENT
+BEGIN:VEVENT
+UID:ozwk@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20250703
+DTEND;VALUE=DATE:20250703
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:US_holidays Independence Day
+END:VEVENT
+BEGIN:VEVENT
+UID:jukq@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20250831
+DTEND;VALUE=DATE:20250831
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:US_holidays Labor Day
+END:VEVENT
+BEGIN:VEVENT
+UID:8xlu@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20251012
+DTEND;VALUE=DATE:20251012
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:US_holidays Columbus Day
+END:VEVENT
+BEGIN:VEVENT
+UID:baz0@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20251110
+DTEND;VALUE=DATE:20251110
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:US_holidays Veterans Day
+END:VEVENT
+BEGIN:VEVENT
+UID:h6o0@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20251126
+DTEND;VALUE=DATE:20251126
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:US_holidays Thanksgiving Day
+END:VEVENT
+BEGIN:VEVENT
+UID:r08d@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20251224
+DTEND;VALUE=DATE:20251224
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:US_holidays Christmas
+END:VEVENT
+END:VCALENDAR
\ No newline at end of file
diff --git a/temp_test_calendar/Date_Based_Calendar.json b/temp_test_calendar/Date_Based_Calendar.json
new file mode 100644
index 0000000..cdf1c35
--- /dev/null
+++ b/temp_test_calendar/Date_Based_Calendar.json
@@ -0,0 +1,16 @@
+{
+  "id": "Date_Based_Calendar",
+  "linkGroupName": "Date Based Calendar",
+  "calendars": [
+    {
+      "url": "C:\\Users\\user\\OneDrive\\Desktop\\Internship tasks\\final calmerg\\test_calendars\\ferien_bayern_2023.ics",
+      "prefix": "Ferien_Bayern_2023",
+      "override": false
+    },
+    {
+      "url": "C:\\Users\\user\\OneDrive\\Desktop\\Internship tasks\\final calmerg\\test_calendars\\US_Holidays.ics",
+      "prefix": "US_holidays",
+      "override": false
+    }
+  ]
+}
\ No newline at end of file
diff --git a/temp_test_calendar/No_Prefix_Calendar.ics b/temp_test_calendar/No_Prefix_Calendar.ics
new file mode 100644
index 0000000..984c7e2
--- /dev/null
+++ b/temp_test_calendar/No_Prefix_Calendar.ics
@@ -0,0 +1,266 @@
+BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//sebbo.net//ical-generator//EN
+NAME:No Prefix Calendar
+X-WR-CALNAME:No Prefix Calendar
+BEGIN:VEVENT
+UID:xp90@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20231231
+DTEND;VALUE=DATE:20231231
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY: New Year's Day
+END:VEVENT
+BEGIN:VEVENT
+UID:y33c@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20240101
+DTEND;VALUE=DATE:20240101
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY: New Year's Day Holiday
+END:VEVENT
+BEGIN:VEVENT
+UID:tk38@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20240102
+DTEND;VALUE=DATE:20240102
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY: New Year's Day Holiday
+END:VEVENT
+BEGIN:VEVENT
+UID:40st@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20240103
+DTEND;VALUE=DATE:20240103
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY: New Year's Day Holiday
+END:VEVENT
+BEGIN:VEVENT
+UID:3apc@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20240104
+DTEND;VALUE=DATE:20240104
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY: New Year's Day Holiday
+END:VEVENT
+BEGIN:VEVENT
+UID:9of5@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20240106
+DTEND;VALUE=DATE:20240106
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY: Orthodox Christmas
+END:VEVENT
+BEGIN:VEVENT
+UID:wg5n@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20240107
+DTEND;VALUE=DATE:20240107
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY: Orthodox Christmas Holiday
+END:VEVENT
+BEGIN:VEVENT
+UID:lzkv@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20240222
+DTEND;VALUE=DATE:20240222
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY: Defender of the Fatherland
+END:VEVENT
+BEGIN:VEVENT
+UID:1qvm@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20240307
+DTEND;VALUE=DATE:20240307
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY: Intl. Women's Day
+END:VEVENT
+BEGIN:VEVENT
+UID:pdp5@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20240430
+DTEND;VALUE=DATE:20240430
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY: Spring and Labor Day
+END:VEVENT
+BEGIN:VEVENT
+UID:q8xc@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20240508
+DTEND;VALUE=DATE:20240508
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY: Victory Day
+END:VEVENT
+BEGIN:VEVENT
+UID:tkix@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20240611
+DTEND;VALUE=DATE:20240611
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY: Russia Day
+END:VEVENT
+BEGIN:VEVENT
+UID:xhej@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20241103
+DTEND;VALUE=DATE:20241103
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY: Civil Unity Day
+END:VEVENT
+BEGIN:VEVENT
+UID:by0h@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20241231
+DTEND;VALUE=DATE:20241231
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY: New Year's Day
+END:VEVENT
+BEGIN:VEVENT
+UID:zldb@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20250101
+DTEND;VALUE=DATE:20250101
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY: New Year's Day Holiday
+END:VEVENT
+BEGIN:VEVENT
+UID:zwyw@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20250102
+DTEND;VALUE=DATE:20250102
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY: New Year's Day Holiday
+END:VEVENT
+BEGIN:VEVENT
+UID:bfof@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20250103
+DTEND;VALUE=DATE:20250103
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY: New Year's Day Holiday
+END:VEVENT
+BEGIN:VEVENT
+UID:xpm1@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20250104
+DTEND;VALUE=DATE:20250104
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY: New Year's Day Holiday
+END:VEVENT
+BEGIN:VEVENT
+UID:2xkq@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20250106
+DTEND;VALUE=DATE:20250106
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY: Orthodox Christmas
+END:VEVENT
+BEGIN:VEVENT
+UID:qfc3@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20250107
+DTEND;VALUE=DATE:20250107
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY: Orthodox Christmas Holiday
+END:VEVENT
+BEGIN:VEVENT
+UID:ppv4@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20250223
+DTEND;VALUE=DATE:20250223
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY: Defender of the Fatherland
+END:VEVENT
+BEGIN:VEVENT
+UID:lsi7@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20250309
+DTEND;VALUE=DATE:20250309
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY: Intl. Women's Day
+END:VEVENT
+BEGIN:VEVENT
+UID:u001@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20250430
+DTEND;VALUE=DATE:20250430
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY: Spring and Labor Day
+END:VEVENT
+BEGIN:VEVENT
+UID:ah8i@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20250508
+DTEND;VALUE=DATE:20250508
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY: Victory Day
+END:VEVENT
+BEGIN:VEVENT
+UID:lksk@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20250611
+DTEND;VALUE=DATE:20250611
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY: Russia Day
+END:VEVENT
+BEGIN:VEVENT
+UID:r7ue@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20251103
+DTEND;VALUE=DATE:20251103
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY: Civil Unity Day
+END:VEVENT
+END:VCALENDAR
\ No newline at end of file
diff --git a/temp_test_calendar/No_Prefix_Calendar.json b/temp_test_calendar/No_Prefix_Calendar.json
new file mode 100644
index 0000000..798f7a9
--- /dev/null
+++ b/temp_test_calendar/No_Prefix_Calendar.json
@@ -0,0 +1,11 @@
+{
+  "id": "No_Prefix_Calendar",
+  "linkGroupName": "No Prefix Calendar",
+  "calendars": [
+    {
+      "url": "C:\\Users\\user\\OneDrive\\Desktop\\Internship tasks\\final calmerg\\test_calendars\\San_Francisco_Public_Holidays.ics",
+      "prefix": "",
+      "override": false
+    }
+  ]
+}
\ No newline at end of file
diff --git a/temp_test_calendar/Override_Calendar.ics b/temp_test_calendar/Override_Calendar.ics
new file mode 100644
index 0000000..9d15f3a
--- /dev/null
+++ b/temp_test_calendar/Override_Calendar.ics
@@ -0,0 +1,266 @@
+BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//sebbo.net//ical-generator//EN
+NAME:Override Calendar
+X-WR-CALNAME:Override Calendar
+BEGIN:VEVENT
+UID:szal@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20231231
+DTEND;VALUE=DATE:20231231
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:Override Event
+END:VEVENT
+BEGIN:VEVENT
+UID:tgm8@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20240101
+DTEND;VALUE=DATE:20240101
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:Override Event
+END:VEVENT
+BEGIN:VEVENT
+UID:rhq7@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20240102
+DTEND;VALUE=DATE:20240102
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:Override Event
+END:VEVENT
+BEGIN:VEVENT
+UID:gpjr@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20240103
+DTEND;VALUE=DATE:20240103
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:Override Event
+END:VEVENT
+BEGIN:VEVENT
+UID:h6te@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20240104
+DTEND;VALUE=DATE:20240104
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:Override Event
+END:VEVENT
+BEGIN:VEVENT
+UID:y5cu@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20240106
+DTEND;VALUE=DATE:20240106
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:Override Event
+END:VEVENT
+BEGIN:VEVENT
+UID:74kr@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20240107
+DTEND;VALUE=DATE:20240107
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:Override Event
+END:VEVENT
+BEGIN:VEVENT
+UID:hwm8@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20240222
+DTEND;VALUE=DATE:20240222
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:Override Event
+END:VEVENT
+BEGIN:VEVENT
+UID:5e0j@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20240307
+DTEND;VALUE=DATE:20240307
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:Override Event
+END:VEVENT
+BEGIN:VEVENT
+UID:a53b@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20240430
+DTEND;VALUE=DATE:20240430
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:Override Event
+END:VEVENT
+BEGIN:VEVENT
+UID:67cr@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20240508
+DTEND;VALUE=DATE:20240508
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:Override Event
+END:VEVENT
+BEGIN:VEVENT
+UID:qzh7@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20240611
+DTEND;VALUE=DATE:20240611
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:Override Event
+END:VEVENT
+BEGIN:VEVENT
+UID:kiuz@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20241103
+DTEND;VALUE=DATE:20241103
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:Override Event
+END:VEVENT
+BEGIN:VEVENT
+UID:cjkp@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20241231
+DTEND;VALUE=DATE:20241231
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:Override Event
+END:VEVENT
+BEGIN:VEVENT
+UID:ztd6@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20250101
+DTEND;VALUE=DATE:20250101
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:Override Event
+END:VEVENT
+BEGIN:VEVENT
+UID:02nl@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20250102
+DTEND;VALUE=DATE:20250102
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:Override Event
+END:VEVENT
+BEGIN:VEVENT
+UID:ir7v@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20250103
+DTEND;VALUE=DATE:20250103
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:Override Event
+END:VEVENT
+BEGIN:VEVENT
+UID:gypv@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20250104
+DTEND;VALUE=DATE:20250104
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:Override Event
+END:VEVENT
+BEGIN:VEVENT
+UID:cfsf@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20250106
+DTEND;VALUE=DATE:20250106
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:Override Event
+END:VEVENT
+BEGIN:VEVENT
+UID:eqfe@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20250107
+DTEND;VALUE=DATE:20250107
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:Override Event
+END:VEVENT
+BEGIN:VEVENT
+UID:qxbb@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20250223
+DTEND;VALUE=DATE:20250223
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:Override Event
+END:VEVENT
+BEGIN:VEVENT
+UID:l9f2@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20250309
+DTEND;VALUE=DATE:20250309
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:Override Event
+END:VEVENT
+BEGIN:VEVENT
+UID:vqz2@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20250430
+DTEND;VALUE=DATE:20250430
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:Override Event
+END:VEVENT
+BEGIN:VEVENT
+UID:7r9i@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20250508
+DTEND;VALUE=DATE:20250508
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:Override Event
+END:VEVENT
+BEGIN:VEVENT
+UID:t6gl@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20250611
+DTEND;VALUE=DATE:20250611
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:Override Event
+END:VEVENT
+BEGIN:VEVENT
+UID:98hx@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART;VALUE=DATE:20251103
+DTEND;VALUE=DATE:20251103
+X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
+X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
+SUMMARY:Override Event
+END:VEVENT
+END:VCALENDAR
\ No newline at end of file
diff --git a/temp_test_calendar/Override_Calendar.json b/temp_test_calendar/Override_Calendar.json
new file mode 100644
index 0000000..f1eed77
--- /dev/null
+++ b/temp_test_calendar/Override_Calendar.json
@@ -0,0 +1,11 @@
+{
+  "id": "Override_Calendar",
+  "linkGroupName": "Override Calendar",
+  "calendars": [
+    {
+      "url": "C:\\Users\\user\\OneDrive\\Desktop\\Internship tasks\\final calmerg\\test_calendars\\San_Francisco_Public_Holidays.ics",
+      "prefix": "Override Event",
+      "override": true
+    }
+  ]
+}
\ No newline at end of file
diff --git a/temp_test_calendar/Time_Based_Calendar.ics b/temp_test_calendar/Time_Based_Calendar.ics
new file mode 100644
index 0000000..7978de2
--- /dev/null
+++ b/temp_test_calendar/Time_Based_Calendar.ics
@@ -0,0 +1,46 @@
+BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//sebbo.net//ical-generator//EN
+NAME:Time Based Calendar
+X-WR-CALNAME:Time Based Calendar
+BEGIN:VEVENT
+UID:eb5u@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART:20241001T183000Z
+DTEND:20241001T193000Z
+SUMMARY:other_work calmerge
+END:VEVENT
+BEGIN:VEVENT
+UID:yu3i@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART:20241010T173000Z
+DTEND:20241010T183000Z
+SUMMARY:other_work to do
+END:VEVENT
+BEGIN:VEVENT
+UID:xnpj@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART:20240930T113000Z
+DTEND:20240930T123000Z
+SUMMARY:work other work
+END:VEVENT
+BEGIN:VEVENT
+UID:an2b@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART:20241003T190000Z
+DTEND:20241003T200000Z
+SUMMARY:work progodessey
+END:VEVENT
+BEGIN:VEVENT
+UID:ywsc@Ryan-jr
+SEQUENCE:0
+DTSTAMP:20241105T125617Z
+DTSTART:20241009T173000Z
+DTEND:20241009T183000Z
+SUMMARY:work do
+END:VEVENT
+END:VCALENDAR
\ No newline at end of file
diff --git a/temp_test_calendar/Time_Based_Calendar.json b/temp_test_calendar/Time_Based_Calendar.json
new file mode 100644
index 0000000..321646e
--- /dev/null
+++ b/temp_test_calendar/Time_Based_Calendar.json
@@ -0,0 +1,16 @@
+{
+  "id": "Time_Based_Calendar",
+  "linkGroupName": "Time Based Calendar",
+  "calendars": [
+    {
+      "url": "C:\\Users\\user\\OneDrive\\Desktop\\Internship tasks\\final calmerg\\test_calendars\\other_work.ics",
+      "prefix": "other_work",
+      "override": false
+    },
+    {
+      "url": "C:\\Users\\user\\OneDrive\\Desktop\\Internship tasks\\final calmerg\\test_calendars\\work.ics",
+      "prefix": "work",
+      "override": false
+    }
+  ]
+}
\ No newline at end of file