diff --git a/src/args.rs b/src/args.rs
index 13d2ea3..d40696f 100644
--- a/src/args.rs
+++ b/src/args.rs
@@ -39,6 +39,9 @@ pub(crate) enum PeopleCommands {
         #[arg(short, long)]
         vcard_file: PathBuf,
     },
+
+    /// Lists the people without date of birth
+    MissingDateOfBirths {},
 }
 
 #[derive(Subcommand)]
diff --git a/src/commands/missing_date_of_birth.rs b/src/commands/missing_date_of_birth.rs
new file mode 100644
index 0000000..94fd825
--- /dev/null
+++ b/src/commands/missing_date_of_birth.rs
@@ -0,0 +1,19 @@
+use crate::{utils::people::fetch_all_contacts, Client};
+use anyhow::Result;
+use log::*;
+
+pub async fn missing_date_of_birth(client: &Client) -> Result<()> {
+    let contacts = fetch_all_contacts(client).await?;
+    let mut filtered_contacts = contacts
+        .iter()
+        .filter(|c| c.birth_date.is_none() && !c.name.is_empty())
+        .collect::<Vec<_>>();
+
+    filtered_contacts.sort_by_key(|c| c.name.clone());
+
+    for c in filtered_contacts {
+        info!("{}", c.name);
+    }
+
+    Ok(())
+}
diff --git a/src/commands/mod.rs b/src/commands/mod.rs
index 6bca56d..5d5b0ac 100644
--- a/src/commands/mod.rs
+++ b/src/commands/mod.rs
@@ -1,2 +1,3 @@
+pub mod missing_date_of_birth;
 pub mod server_version;
 pub mod sync_date_of_birth;
diff --git a/src/commands/sync_date_of_birth.rs b/src/commands/sync_date_of_birth.rs
index d022627..7689814 100644
--- a/src/commands/sync_date_of_birth.rs
+++ b/src/commands/sync_date_of_birth.rs
@@ -11,6 +11,7 @@ use vcard4::{
 
 use crate::{
     types::{PersonResponseDto, PersonUpdateDto},
+    utils::people::fetch_all_contacts,
     Client,
 };
 
@@ -118,20 +119,3 @@ async fn update_person_bday(
 
     Ok(())
 }
-
-async fn fetch_all_contacts(client: &Client) -> Result<Vec<PersonResponseDto>> {
-    let mut all_people = Vec::new();
-    let mut page_number = 1;
-    let mut has_next_page = true;
-
-    while has_next_page {
-        let fetched = client
-            .get_all_people(Some(page_number.into()), None, Some(true))
-            .await?;
-        all_people.extend(fetched.people.clone());
-        has_next_page = fetched.has_next_page.expect("Missing has_next_page");
-        page_number += 1;
-    }
-
-    Ok(all_people)
-}
diff --git a/src/main.rs b/src/main.rs
index f167507..f43deb0 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -4,12 +4,14 @@ use crate::args::Commands;
 use anyhow::Result;
 use args::{PeopleCommands, ServerCommands};
 use clap::Parser;
+use commands::missing_date_of_birth::missing_date_of_birth;
 use commands::server_version::server_version;
 use commands::sync_date_of_birth::sync_date_of_birth;
 use reqwest::header;
 
 mod args;
 mod commands;
+mod utils;
 
 #[tokio::main]
 async fn main() {
@@ -21,6 +23,7 @@ async fn main() {
 
     let res = match &args.command {
         Commands::People { people_command } => match people_command {
+            PeopleCommands::MissingDateOfBirths {} => missing_date_of_birth(&client).await,
             PeopleCommands::SyncDateOfBirths { vcard_file } => {
                 sync_date_of_birth(&client, vcard_file, args.dry_run).await
             }
diff --git a/src/utils/mod.rs b/src/utils/mod.rs
new file mode 100644
index 0000000..24eb2de
--- /dev/null
+++ b/src/utils/mod.rs
@@ -0,0 +1 @@
+pub mod people;
diff --git a/src/utils/people.rs b/src/utils/people.rs
new file mode 100644
index 0000000..039e9e2
--- /dev/null
+++ b/src/utils/people.rs
@@ -0,0 +1,19 @@
+use crate::{types::PersonResponseDto, Client};
+use anyhow::Result;
+
+pub async fn fetch_all_contacts(client: &Client) -> Result<Vec<PersonResponseDto>> {
+    let mut all_people = Vec::new();
+    let mut page_number = 1;
+    let mut has_next_page = true;
+
+    while has_next_page {
+        let fetched = client
+            .get_all_people(Some(page_number.into()), None, Some(true))
+            .await?;
+        all_people.extend(fetched.people.clone());
+        has_next_page = fetched.has_next_page.expect("Missing has_next_page");
+        page_number += 1;
+    }
+
+    Ok(all_people)
+}