diff --git a/Cargo.lock b/Cargo.lock
index aefa4a7..61154ed 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -29,6 +29,15 @@ dependencies = [
  "zerocopy",
 ]
 
+[[package]]
+name = "aho-corasick"
+version = "0.7.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cc936419f96fa211c1b9166887b38e5e40b19958e5b895be7c1f93adec7071ac"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "aho-corasick"
 version = "1.1.3"
@@ -135,12 +144,24 @@ dependencies = [
  "windows-targets",
 ]
 
+[[package]]
+name = "base64"
+version = "0.21.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9d297deb1925b89f2ccc13d7635fa0714f12c87adce1c75356b39ca9b7178567"
+
 [[package]]
 name = "base64"
 version = "0.22.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "72b3254f16251a8381aa12e40e3c4d2f0199f8c6508fbecb9d91f575e0fbb8c6"
 
+[[package]]
+name = "beef"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3a8241f3ebb85c056b509d4327ad0358fbbba6ffb340bf388f26350aeda225b1"
+
 [[package]]
 name = "bitflags"
 version = "1.3.2"
@@ -257,6 +278,15 @@ version = "0.8.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "773648b94d0e5d620f64f280777445740e61fe701025087ec8b57f45c791888b"
 
+[[package]]
+name = "deranged"
+version = "0.3.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b42b6fa04a440b495c8b04d0e71b707c585f83cb9cb28cf8cd0d976c315e31b4"
+dependencies = [
+ "powerfmt",
+]
+
 [[package]]
 name = "dyn-clone"
 version = "1.0.17"
@@ -272,6 +302,19 @@ dependencies = [
  "cfg-if",
 ]
 
+[[package]]
+name = "env_logger"
+version = "0.10.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4cd405aab171cb85d6735e5c8d9db038c17d3ca007a4d2c25f337935c3d90580"
+dependencies = [
+ "humantime",
+ "is-terminal",
+ "log",
+ "regex",
+ "termcolor",
+]
+
 [[package]]
 name = "equivalent"
 version = "1.0.1"
@@ -477,6 +520,12 @@ version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d231dfb89cfffdbc30e7fc41579ed6066ad03abda9e567ccafae602b97ec5024"
 
+[[package]]
+name = "hermit-abi"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fbf6a919d6cf397374f7dfeeea91d974c7c0a7221d0d0f4f20d859d329e53fcc"
+
 [[package]]
 name = "http"
 version = "1.1.0"
@@ -517,6 +566,12 @@ version = "1.9.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7d71d3574edd2771538b901e6549113b4006ece66150fb69c0fb6d9a2adae946"
 
+[[package]]
+name = "humantime"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a3a5bfb195931eeb336b2a7b4d761daec841b97f947d34394601737a7bba5e4"
+
 [[package]]
 name = "hyper"
 version = "1.5.0"
@@ -630,6 +685,8 @@ dependencies = [
  "chrono",
  "clap",
  "futures",
+ "log",
+ "pretty_env_logger",
  "prettyplease",
  "progenitor",
  "progenitor-client",
@@ -640,6 +697,7 @@ dependencies = [
  "syn",
  "tokio",
  "uuid",
+ "vcard4",
 ]
 
 [[package]]
@@ -659,6 +717,17 @@ version = "2.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ddc24109865250148c2e0f3d25d4f0f479571723792d3802153c60922a4fb708"
 
+[[package]]
+name = "is-terminal"
+version = "0.4.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "261f68e344040fbd0edea105bef17c66edf46f984ddb1115b775ce31be948f4b"
+dependencies = [
+ "hermit-abi 0.4.0",
+ "libc",
+ "windows-sys 0.52.0",
+]
+
 [[package]]
 name = "is_terminal_polyfill"
 version = "1.70.1"
@@ -714,6 +783,39 @@ version = "0.4.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a7a70ba024b9dc04c27ea2f0c0548feb474ec5c54bba33a7f72f873a39d07b24"
 
+[[package]]
+name = "logos"
+version = "0.14.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1c6b6e02facda28ca5fb8dbe4b152496ba3b1bd5a4b40bb2b1b2d8ad74e0f39b"
+dependencies = [
+ "logos-derive",
+]
+
+[[package]]
+name = "logos-codegen"
+version = "0.14.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b32eb6b5f26efacd015b000bfc562186472cd9b34bdba3f6b264e2a052676d10"
+dependencies = [
+ "beef",
+ "fnv",
+ "lazy_static",
+ "proc-macro2",
+ "quote",
+ "regex-syntax",
+ "syn",
+]
+
+[[package]]
+name = "logos-derive"
+version = "0.14.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3e5d0c5463c911ef55624739fc353238b4e310f0144be1f875dc42fec6bfd5ec"
+dependencies = [
+ "logos-codegen",
+]
+
 [[package]]
 name = "memchr"
 version = "2.7.4"
@@ -741,7 +843,7 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "80e04d1dcff3aae0704555fe5fee3bcfaf3d1fdf8a7e521d5b9d2b42acb52cec"
 dependencies = [
- "hermit-abi",
+ "hermit-abi 0.3.9",
  "libc",
  "wasi",
  "windows-sys 0.52.0",
@@ -765,6 +867,12 @@ dependencies = [
  "tempfile",
 ]
 
+[[package]]
+name = "num-conv"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "51d515d32fb182ee37cda2ccdcb92950d6a3c2893aa280e540671c2cd0f3b1d9"
+
 [[package]]
 name = "num-traits"
 version = "0.2.19"
@@ -891,6 +999,22 @@ version = "0.3.31"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "953ec861398dccce10c670dfeaf3ec4911ca479e9c02154b3a215178c5f566f2"
 
+[[package]]
+name = "powerfmt"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "439ee305def115ba05938db6eb1644ff94165c5ab5e9420d1c1bcedbba909391"
+
+[[package]]
+name = "pretty_env_logger"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "865724d4dbe39d9f3dd3b52b88d859d66bcb2d6a0acfd5ea68a65fb66d4bdc1c"
+dependencies = [
+ "env_logger",
+ "log",
+]
+
 [[package]]
 name = "prettyplease"
 version = "0.2.24"
@@ -1000,7 +1124,7 @@ version = "1.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "38200e5ee88914975b69f657f0801b6f6dccafd44fd9326302a4aaeecfacb1d8"
 dependencies = [
- "aho-corasick",
+ "aho-corasick 1.1.3",
  "memchr",
  "regex-automata",
  "regex-syntax",
@@ -1012,7 +1136,7 @@ version = "0.4.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "368758f23274712b504848e9d5a6f010445cc8b87a7cdb4d7cbee666c1288da3"
 dependencies = [
- "aho-corasick",
+ "aho-corasick 1.1.3",
  "memchr",
  "regex-syntax",
 ]
@@ -1039,7 +1163,7 @@ version = "0.12.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f713147fbe92361e52392c73b8c9e48c04c6625bce969ef54dc901e58e042a7b"
 dependencies = [
- "base64",
+ "base64 0.22.1",
  "bytes",
  "encoding_rs",
  "futures-core",
@@ -1422,6 +1546,15 @@ dependencies = [
  "windows-sys 0.59.0",
 ]
 
+[[package]]
+name = "termcolor"
+version = "1.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "06794f8f6c5c898b3275aebefa6b8a1cb24cd2c6c79397ab15774837a0bc5755"
+dependencies = [
+ "winapi-util",
+]
+
 [[package]]
 name = "thiserror"
 version = "1.0.65"
@@ -1442,6 +1575,37 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "time"
+version = "0.3.36"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5dfd88e563464686c916c7e46e623e520ddc6d79fa6641390f2e3fa86e83e885"
+dependencies = [
+ "deranged",
+ "itoa",
+ "num-conv",
+ "powerfmt",
+ "serde",
+ "time-core",
+ "time-macros",
+]
+
+[[package]]
+name = "time-core"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ef927ca75afb808a4d64dd374f00a2adf8d0fcff8e7b184af886c3c87ec4a3f3"
+
+[[package]]
+name = "time-macros"
+version = "0.2.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3f252a68540fde3a3877aeea552b832b40ab9a69e318efd078774a01ddee1ccf"
+dependencies = [
+ "num-conv",
+ "time-core",
+]
+
 [[package]]
 name = "tinyvec"
 version = "1.8.0"
@@ -1619,6 +1783,12 @@ dependencies = [
  "tinyvec",
 ]
 
+[[package]]
+name = "unicode-segmentation"
+version = "1.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f6ccf251212114b54433ec949fd6a7841275f9ada20dddd2f29e9ceea4501493"
+
 [[package]]
 name = "unsafe-libyaml"
 version = "0.2.11"
@@ -1631,6 +1801,16 @@ version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8ecb6da28b8a351d773b68d5825ac39017e680750f980f3a1a85cd8dd28a47c1"
 
+[[package]]
+name = "uriparse"
+version = "0.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0200d0fc04d809396c2ad43f3c95da3582a2556eba8d453c1087f4120ee352ff"
+dependencies = [
+ "fnv",
+ "lazy_static",
+]
+
 [[package]]
 name = "url"
 version = "2.5.2"
@@ -1658,6 +1838,22 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "vcard4"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "92713aa20d2ffffdbc8e62cd3ebc14b448fc7d58b00f6976da8cef5419297101"
+dependencies = [
+ "aho-corasick 0.7.20",
+ "base64 0.21.7",
+ "logos",
+ "thiserror",
+ "time",
+ "unicode-segmentation",
+ "uriparse",
+ "zeroize",
+]
+
 [[package]]
 name = "vcpkg"
 version = "0.2.15"
@@ -1775,6 +1971,15 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "winapi-util"
+version = "0.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cf221c93e13a30d793f7645a0e7762c55d169dbb0a49671918a2319d289b10bb"
+dependencies = [
+ "windows-sys 0.59.0",
+]
+
 [[package]]
 name = "windows-core"
 version = "0.52.0"
@@ -1921,3 +2126,17 @@ name = "zeroize"
 version = "1.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ced3678a2879b30306d323f4542626697a464a97c0a07c9aebf7ebca65cd4dde"
+dependencies = [
+ "zeroize_derive",
+]
+
+[[package]]
+name = "zeroize_derive"
+version = "1.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ce36e65b0d2999d2aafac989fb249189a141aee1f53c612c1f37d72631959f69"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
diff --git a/Cargo.toml b/Cargo.toml
index e8ab2d3..a26b804 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,12 +8,15 @@ anyhow = "1.0.91"
 chrono = { version = "0.4.38", features = ["serde"] }
 clap = { version = "4.5.20", features = ["derive"] }
 futures = "0.3.31"
+log = "0.4.22"
+pretty_env_logger = "0.5.0"
 progenitor-client = "0.8.0"
 regress = "0.10.1"
 reqwest = { version = "0.12.8", features = ["json", "stream"] }
 serde = { version = "1.0.213", features = ["derive"] }
 tokio = { version = "1.41.0", features = ["full"] }
 uuid = { version = "1.11.0", features = ["serde", "v4"] }
+vcard4 = "0.5.2"
 
 [build-dependencies]
 prettyplease = "0.2.24"
diff --git a/src/args.rs b/src/args.rs
index b3b1c5a..13d2ea3 100644
--- a/src/args.rs
+++ b/src/args.rs
@@ -1,3 +1,5 @@
+use std::path::PathBuf;
+
 use clap::{command, Parser, Subcommand};
 
 #[derive(Parser)]
@@ -9,12 +11,20 @@ pub(crate) struct Opts {
     #[arg(short, long)]
     pub api_key: String,
 
+    #[arg(short, long)]
+    pub dry_run: bool,
+
     #[command(subcommand)]
     pub command: Commands,
 }
 
 #[derive(Subcommand)]
 pub(crate) enum Commands {
+    /// People related commands
+    People {
+        #[command(subcommand)]
+        people_command: PeopleCommands,
+    },
     /// Server related commands
     Server {
         #[command(subcommand)]
@@ -22,6 +32,15 @@ pub(crate) enum Commands {
     },
 }
 
+#[derive(Subcommand)]
+pub(crate) enum PeopleCommands {
+    /// Synchronises date of births from a vcard file
+    SyncDateOfBirths {
+        #[arg(short, long)]
+        vcard_file: PathBuf,
+    },
+}
+
 #[derive(Subcommand)]
 pub(crate) enum ServerCommands {
     /// Fetches the version of the server
diff --git a/src/commands/mod.rs b/src/commands/mod.rs
index 437a21e..6bca56d 100644
--- a/src/commands/mod.rs
+++ b/src/commands/mod.rs
@@ -1 +1,2 @@
 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
new file mode 100644
index 0000000..d022627
--- /dev/null
+++ b/src/commands/sync_date_of_birth.rs
@@ -0,0 +1,137 @@
+use std::{fs, path::PathBuf};
+
+use anyhow::Result;
+use chrono::{Datelike, NaiveDate};
+use log::*;
+use uuid::Uuid;
+use vcard4::{
+    parse_loose,
+    property::{DateAndOrTime, DateTimeOrTextProperty},
+};
+
+use crate::{
+    types::{PersonResponseDto, PersonUpdateDto},
+    Client,
+};
+
+pub async fn sync_date_of_birth(
+    client: &Client,
+    vcard_file: &PathBuf,
+    dry_run: bool,
+) -> Result<()> {
+    let server_contacts = fetch_all_contacts(client).await?;
+
+    let filtered_contacts: Vec<_> = server_contacts
+        .iter()
+        .filter(|p| !p.name.is_empty())
+        .collect();
+
+    let contacts = fs::read_to_string(vcard_file)?;
+    let cards = parse_loose(contacts)?;
+
+    let cards_with_bday: Vec<_> = cards.iter().filter(|c| c.bday.is_some()).collect();
+
+    info!(
+        "{} vcards with date of births, {} persons with names fetched from Immich",
+        cards_with_bday.len(),
+        filtered_contacts.len()
+    );
+
+    let mut updated_dobs = 0;
+
+    for card in cards_with_bday {
+        let name = card.formatted_name.first().map(|text| text.value.clone());
+        match name {
+            Some(formatted_name) => {
+                let contact = filtered_contacts.iter().find(|c| c.name == formatted_name);
+                match contact {
+                    Some(c) => match card.bday.as_ref().unwrap() {
+                        DateTimeOrTextProperty::DateTime(dt) => {
+                            let bday = vcard_date_to_naive_date(dt.value.first().unwrap().clone())?;
+                            if c.birth_date.as_ref().map_or(false, |bdate| bday == *bdate) {
+                                debug!(
+                                    "{} already has the proper date of birth, skipping",
+                                    formatted_name
+                                );
+                            } else if bday.year() > 0 {
+                                update_person_bday(c, bday, client, dry_run).await?;
+                                updated_dobs += 1;
+                            } else {
+                                debug!(
+                                    "{} has an incomplete date of birth, skipping",
+                                    formatted_name
+                                );
+                            }
+                        }
+                        DateTimeOrTextProperty::Text(_) => todo!(),
+                    },
+                    None => debug!("No Immich match for {}", formatted_name),
+                }
+            }
+            None => todo!(),
+        }
+    }
+
+    info!("Updated {} persons", updated_dobs);
+
+    Ok(())
+}
+
+fn vcard_date_to_naive_date(src: DateAndOrTime) -> Result<NaiveDate> {
+    match src {
+        DateAndOrTime::Date(date) => {
+            Ok(
+                NaiveDate::from_ymd_opt(date.year(), date.month() as u32, date.day().into())
+                    .expect(&format!("Unable to parse {}", date)),
+            )
+        }
+        DateAndOrTime::DateTime(datetime) => Ok(NaiveDate::from_ymd_opt(
+            datetime.year(),
+            datetime.month() as u32,
+            datetime.day().into(),
+        )
+        .expect(&format!("Unable to parse {}", datetime))),
+        DateAndOrTime::Time(_time) => todo!(),
+    }
+}
+
+async fn update_person_bday(
+    person: &PersonResponseDto,
+    bday: NaiveDate,
+    client: &Client,
+    dry_run: bool,
+) -> Result<()> {
+    let update = PersonUpdateDto {
+        feature_face_asset_id: None,
+        is_hidden: None,
+        name: None,
+        birth_date: Some(bday),
+    };
+
+    info!("Updating {}: {:?}", person.name, update);
+
+    if !dry_run {
+        client
+            .update_person(&Uuid::parse_str(&person.id)?, &update)
+            .await?;
+    }
+
+    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 c1c2a3c..f167507 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -2,9 +2,10 @@ include!(concat!(env!("OUT_DIR"), "/codegen.rs"));
 
 use crate::args::Commands;
 use anyhow::Result;
-use args::ServerCommands;
+use args::{PeopleCommands, ServerCommands};
 use clap::Parser;
 use commands::server_version::server_version;
+use commands::sync_date_of_birth::sync_date_of_birth;
 use reqwest::header;
 
 mod args;
@@ -12,11 +13,18 @@ mod commands;
 
 #[tokio::main]
 async fn main() {
+    pretty_env_logger::init();
+
     let args = args::Opts::parse();
 
     let client = get_client(&args.server_url, &args.api_key).unwrap();
 
     let res = match &args.command {
+        Commands::People { people_command } => match people_command {
+            PeopleCommands::SyncDateOfBirths { vcard_file } => {
+                sync_date_of_birth(&client, vcard_file, args.dry_run).await
+            }
+        },
         Commands::Server { server_command } => match server_command {
             ServerCommands::Version {} => server_version(&client).await,
         },