fix: use PDT isntead of UTC

Cargo.lock

@@ -196,6 +196,16 @@ dependencies = [
  "windows-link",
 ]
 
+[[package]]
+name = "chrono-tz"
+version = "0.10.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a6139a8597ed92cf816dfb33f5dd6cf0bb93a6adc938f11039f371bc5bcd26c3"
+dependencies = [
+ "chrono",
+ "phf",
+]
+
 [[package]]
 name = "core-foundation-sys"
 version = "0.8.7"
@@ -869,6 +879,7 @@ dependencies = [
  "anyhow",
  "axum",
  "chrono",
+ "chrono-tz",
  "noisebell-common",
  "reqwest",
  "rusqlite",
@@ -985,6 +996,24 @@ version = "2.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9b4f627cb1b25917193a259e49bdad08f671f8d9708acfd5fe0a8c1455d87220"
 
+[[package]]
+name = "phf"
+version = "0.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "913273894cec178f401a31ec4b656318d95473527be05c0752cc41cdc32be8b7"
+dependencies = [
+ "phf_shared",
+]
+
+[[package]]
+name = "phf_shared"
+version = "0.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "06005508882fb681fd97892ecff4b7fd0fee13ef1aa569f8695dae7ab9099981"
+dependencies = [
+ "siphasher",
+]
+
 [[package]]
 name = "pin-project-lite"
 version = "0.2.17"
@@ -1494,6 +1523,12 @@ version = "0.3.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e320a6c5ad31d271ad523dcf3ad13e2767ad8b1cb8f047f75a8aeaf8da139da2"
 
+[[package]]
+name = "siphasher"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b2aa850e253778c88a04c3d7323b043aeda9d3e30d5971937c1855769763678e"
+
 [[package]]
 name = "slab"
 version = "0.4.12"

remote/cache-service/Cargo.toml

@@ -10,6 +10,7 @@ workspace = true
 anyhow = "1.0"
 axum = "0.8"
 chrono = "0.4"
+chrono-tz = "0.10"
 noisebell-common = { path = "../noisebell-common" }
 reqwest = { version = "0.12", default-features = false, features = ["json", "rustls-tls"] }
 rusqlite = { version = "0.33", features = ["bundled"] }

remote/cache-service/src/api.rs

@@ -5,6 +5,7 @@ use axum::http::{header, HeaderMap, StatusCode};
 use axum::response::{IntoResponse, Response};
 use axum::Json;
 use chrono::{DateTime, Utc};
+use chrono_tz::America::Los_Angeles;
 use noisebell_common::{validate_bearer, CacheStatusResponse, DoorStatus, WebhookPayload};
 use tokio::sync::Mutex;
 use tracing::{error, info};
@@ -115,7 +116,9 @@ fn unix_now() -> u64 {
 
 fn format_full_timestamp(ts: u64) -> String {
     DateTime::from_timestamp(ts as i64, 0)
-        .map(|dt: DateTime<Utc>| dt.format("%A, %B %-d, %Y at %-I:%M:%S %p UTC").to_string())
+        .map(|dt: DateTime<Utc>| {
+            dt.with_timezone(&Los_Angeles).format("%A, %B %-d, %Y at %-I:%M:%S %p %Z").to_string()
+        })
         .unwrap_or_else(|| format!("unix timestamp {ts}"))
 }
 
@@ -364,6 +367,18 @@ mod tests {
         assert_eq!(format_duration(3_723), "1 hour and 2 minutes");
     }
 
+    #[test]
+    fn format_full_timestamp_uses_san_francisco_timezone() {
+        let ts = 1_711_312_063;
+        let expected = DateTime::from_timestamp(ts, 0)
+            .unwrap()
+            .with_timezone(&Los_Angeles)
+            .format("%A, %B %-d, %Y at %-I:%M:%S %p %Z")
+            .to_string();
+
+        assert_eq!(format_full_timestamp(ts as u64), expected);
+    }
+
     #[test]
     fn status_summary_includes_since_and_last_checked() {
         let summary = status_summary(DoorStatus::Open, Some(1_000), Some(1_125), 1_180);