diff --git a/webcal/src/main/java/com/onixbyte/icalendar/component/property/Attendee.java b/webcal/src/main/java/com/onixbyte/icalendar/component/property/Attendee.java
new file mode 100644
index 0000000..89c2744
--- /dev/null
+++ b/webcal/src/main/java/com/onixbyte/icalendar/component/property/Attendee.java
@@ -0,0 +1,213 @@
+/*
+ * Copyright (C) 2024-2024 OnixByte.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.onixbyte.icalendar.component.property;
+
+import com.onixbyte.icalendar.datatype.CalendarUserAddress;
+import com.onixbyte.icalendar.property.parameter.*;
+
+import java.util.Optional;
+
+public final class Attendee implements ComponentProperty {
+
+    public static final String PROPERTY_NAME = "ATTENDEE";
+
+    private final CalendarUserType calendarUserType;
+
+    private final GroupOrListMembership groupOrListMembership;
+
+    private final ParticipationRole role;
+
+    private final ParticipationStatus status;
+
+    private final RsvpExpectation rsvp;
+
+    private final Delegatee delegatee;
+
+    private final Delegator delegator;
+
+    private final SentBy sentBy;
+
+    private final CommonName commonName;
+
+    private final DirectoryEntryReference directory;
+
+    private final Language language;
+
+    private final CalendarUserAddress value;
+
+    private Attendee(CalendarUserType calendarUserType,
+                     GroupOrListMembership groupOrListMembership,
+                     ParticipationRole role,
+                     ParticipationStatus status,
+                     RsvpExpectation rsvp,
+                     Delegatee delegatee,
+                     Delegator delegator,
+                     SentBy sentBy,
+                     CommonName commonName,
+                     DirectoryEntryReference directory,
+                     Language language,
+                     CalendarUserAddress value) {
+        this.calendarUserType = calendarUserType;
+        this.groupOrListMembership = groupOrListMembership;
+        this.role = role;
+        this.status = status;
+        this.rsvp = rsvp;
+        this.delegatee = delegatee;
+        this.delegator = delegator;
+        this.sentBy = sentBy;
+        this.commonName = commonName;
+        this.directory = directory;
+        this.language = language;
+        this.value = value;
+    }
+
+    public static class Builder {
+        private CalendarUserType calendarUserType;
+
+        private GroupOrListMembership groupOrListMembership;
+
+        private ParticipationRole role;
+
+        private ParticipationStatus status;
+
+        private RsvpExpectation rsvp;
+
+        private Delegatee delegatee;
+
+        private Delegator delegator;
+
+        private SentBy sentBy;
+
+        private CommonName commonName;
+
+        private DirectoryEntryReference directory;
+
+        private Language language;
+
+        private CalendarUserAddress attendee;
+
+        private Builder() {
+        }
+
+        public Builder calendarUserType(CalendarUserType calendarUserType) {
+            this.calendarUserType = calendarUserType;
+            return this;
+        }
+
+        public Builder groupOrListMembership(GroupOrListMembership groupOrListMembership) {
+            this.groupOrListMembership = groupOrListMembership;
+            return this;
+        }
+
+        public Builder role(ParticipationRole role) {
+            this.role = role;
+            return this;
+        }
+
+        public Builder status(ParticipationStatus status) {
+            this.status = status;
+            return this;
+        }
+
+        public Builder rsvp(RsvpExpectation rsvp) {
+            this.rsvp = rsvp;
+            return this;
+        }
+
+        public Builder delegatee(Delegatee delegatee) {
+            this.delegatee = delegatee;
+            return this;
+        }
+
+        public Builder delegator(Delegator delegator) {
+            this.delegator = delegator;
+            return this;
+        }
+
+        public Builder sentBy(SentBy sentBy) {
+            this.sentBy = sentBy;
+            return this;
+        }
+
+        public Builder commonName(CommonName commonName) {
+            this.commonName = commonName;
+            return this;
+        }
+
+        public Builder directory(DirectoryEntryReference directory) {
+            this.directory = directory;
+            return this;
+        }
+
+        public Builder language(Language language) {
+            this.language = language;
+            return this;
+        }
+
+        public Builder attendee(CalendarUserAddress calendarUserAddress) {
+            this.attendee = calendarUserAddress;
+            return this;
+        }
+
+        public Attendee build() {
+            return new Attendee(calendarUserType, groupOrListMembership, role, status, rsvp,
+                    delegatee, delegator, sentBy, commonName, directory, language, attendee);
+        }
+    }
+
+    public static Builder builder() {
+        return new Builder();
+    }
+
+    @Override
+    public String resolve() {
+        var builder = new StringBuilder(PROPERTY_NAME);
+
+        builder.append(Optional.ofNullable(calendarUserType)
+                        .map(CalendarUserType::resolve)
+                        .orElse(""))
+                .append(Optional.ofNullable(groupOrListMembership)
+                        .map(GroupOrListMembership::resolve)
+                        .orElse(""))
+                .append(Optional.ofNullable(role)
+                        .map(ParticipationRole::resolve)
+                        .orElse(""))
+                .append(Optional.ofNullable(status)
+                        .map(ParticipationStatus::resolve)
+                        .orElse(""))
+                .append(Optional.ofNullable(rsvp)
+                        .map(RsvpExpectation::resolve)
+                        .orElse(""))
+                .append(Optional.ofNullable(delegatee)
+                        .map(Delegatee::resolve)
+                        .orElse(""))
+                .append(Optional.ofNullable(delegator)
+                        .map(Delegator::resolve)
+                        .orElse(""))
+                .append(Optional.ofNullable(sentBy)
+                        .map(SentBy::resolve)
+                        .orElse(""))
+                .append(Optional.ofNullable(commonName)
+                        .map(CommonName::resolve)
+                        .orElse(""));
+                // .append()
+
+
+        return "";
+    }
+}
diff --git a/webcal/src/main/java/com/onixbyte/icalendar/component/property/TimeZoneOffsetFrom.java b/webcal/src/main/java/com/onixbyte/icalendar/component/property/TimeZoneOffsetFrom.java
index 14d7668..ae2cf38 100644
--- a/webcal/src/main/java/com/onixbyte/icalendar/component/property/TimeZoneOffsetFrom.java
+++ b/webcal/src/main/java/com/onixbyte/icalendar/component/property/TimeZoneOffsetFrom.java
@@ -1,4 +1,30 @@
+/*
+ * Copyright (C) 2024-2024 OnixByte.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package com.onixbyte.icalendar.component.property;
 
-public record TimeZoneOffsetFrom() {
+import com.onixbyte.icalendar.datatype.UtcOffset;
+
+public record TimeZoneOffsetFrom(UtcOffset offset) implements ComponentProperty {
+
+    private static final String PROPERTY_NAME = "TZOFFSETFROM";
+
+    @Override
+    public String resolve() {
+        return PROPERTY_NAME + ":" + offset.resolve() + "\n";
+    }
 }
diff --git a/webcal/src/main/java/com/onixbyte/icalendar/component/property/TimeZoneOffsetTo.java b/webcal/src/main/java/com/onixbyte/icalendar/component/property/TimeZoneOffsetTo.java
new file mode 100644
index 0000000..0067add
--- /dev/null
+++ b/webcal/src/main/java/com/onixbyte/icalendar/component/property/TimeZoneOffsetTo.java
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2024-2024 OnixByte.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.onixbyte.icalendar.component.property;
+
+import com.onixbyte.icalendar.datatype.UtcOffset;
+
+public record TimeZoneOffsetTo(UtcOffset offset) implements ComponentProperty {
+
+    public static final String PROPERTY_NAME = "TZOFFSETTO";
+
+    @Override
+    public String resolve() {
+        return PROPERTY_NAME + ":" + offset.resolve() + "\n";
+    }
+}
diff --git a/webcal/src/main/java/com/onixbyte/icalendar/component/property/TimeZoneUrl.java b/webcal/src/main/java/com/onixbyte/icalendar/component/property/TimeZoneUrl.java
new file mode 100644
index 0000000..781690e
--- /dev/null
+++ b/webcal/src/main/java/com/onixbyte/icalendar/component/property/TimeZoneUrl.java
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2024-2024 OnixByte.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.onixbyte.icalendar.component.property;
+
+import java.net.URI;
+
+public record TimeZoneUrl(URI uri) implements ComponentProperty {
+
+    public static final String PROPERTY_NAME = "TZURL";
+
+    @Override
+    public String resolve() {
+        return PROPERTY_NAME + ":" + uri + "\n";
+    }
+}
diff --git a/webcal/src/main/java/com/onixbyte/icalendar/datatype/UtcOffset.java b/webcal/src/main/java/com/onixbyte/icalendar/datatype/UtcOffset.java
new file mode 100644
index 0000000..aad2537
--- /dev/null
+++ b/webcal/src/main/java/com/onixbyte/icalendar/datatype/UtcOffset.java
@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2024-2024 OnixByte.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.onixbyte.icalendar.datatype;
+
+import com.onixbyte.icalendar.property.Resolvable;
+
+public record UtcOffset(char sign, int hour, int minute) implements Resolvable {
+
+    @Override
+    public String resolve() {
+        return "%c%02d%02d".formatted(sign, hour, minute);
+    }
+}
diff --git a/webcal/src/main/java/com/onixbyte/icalendar/property/parameter/UserType.java b/webcal/src/main/java/com/onixbyte/icalendar/property/parameter/CalendarUserType.java
similarity index 95%
rename from webcal/src/main/java/com/onixbyte/icalendar/property/parameter/UserType.java
rename to webcal/src/main/java/com/onixbyte/icalendar/property/parameter/CalendarUserType.java
index dc182a3..a7c56c9 100644
--- a/webcal/src/main/java/com/onixbyte/icalendar/property/parameter/UserType.java
+++ b/webcal/src/main/java/com/onixbyte/icalendar/property/parameter/CalendarUserType.java
@@ -22,7 +22,7 @@ package com.onixbyte.icalendar.property.parameter;
  *
  * @author Zihlu WANG
  */
-public enum UserType implements PropertyParameter {
+public enum CalendarUserType implements PropertyParameter {
 
     /**
      * An individual.