diff --git a/Cargo.lock b/Cargo.lock
index 4bd6a7f..589dd9b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -280,6 +280,28 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "chrono-tz"
+version = "0.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f1369bc6b9e9a7dfdae2055f6ec151fe9c554a9d23d357c0237cee2e25eaabb7"
+dependencies = [
+ "chrono",
+ "chrono-tz-build",
+ "phf",
+]
+
+[[package]]
+name = "chrono-tz-build"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e2f5ebdc942f57ed96d560a6d1a459bae5851102a25d5bf89dc04ae453e31ecf"
+dependencies = [
+ "parse-zoneinfo",
+ "phf",
+ "phf_codegen",
+]
+
 [[package]]
 name = "clap"
 version = "4.3.24"
@@ -1054,10 +1076,11 @@ checksum = "b5e6163cb8c49088c2c36f57875e58ccd8c87c7427f7fbd50ea6710b2f3f2e8f"
 [[package]]
 name = "manifold"
 version = "1.0.0"
-source = "git+ssh://git@code.orbiter-radio.uk/source/mfold.git?branch=feature/poise#06064a8c9efffa71a8a619b1baa79cc3261c7cac"
+source = "git+ssh://git@code.orbiter-radio.uk/source/mfold.git?branch=feature/poise#8a02ee76662d03b5ad036124a944c5fc57a6fa0e"
 dependencies = [
  "built",
  "chrono",
+ "chrono-tz",
  "clap",
  "config",
  "d20",
@@ -1360,6 +1383,15 @@ dependencies = [
  "windows-targets",
 ]
 
+[[package]]
+name = "parse-zoneinfo"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c705f256449c60da65e11ff6626e0c16a0a0b96aaa348de61376b249bc340f41"
+dependencies = [
+ "regex 1.9.3",
+]
+
 [[package]]
 name = "pathdiff"
 version = "0.2.1"
@@ -1416,6 +1448,44 @@ dependencies = [
  "sha2",
 ]
 
+[[package]]
+name = "phf"
+version = "0.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ade2d8b8f33c7333b51bcf0428d37e217e9f32192ae4772156f65063b8ce03dc"
+dependencies = [
+ "phf_shared",
+]
+
+[[package]]
+name = "phf_codegen"
+version = "0.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e8d39688d359e6b34654d328e262234662d16cc0f60ec8dcbe5e718709342a5a"
+dependencies = [
+ "phf_generator",
+ "phf_shared",
+]
+
+[[package]]
+name = "phf_generator"
+version = "0.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "48e4cc64c2ad9ebe670cb8fd69dd50ae301650392e81c05f9bfcb2d5bdbc24b0"
+dependencies = [
+ "phf_shared",
+ "rand 0.8.5",
+]
+
+[[package]]
+name = "phf_shared"
+version = "0.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "90fcb95eef784c2ac79119d1dd819e162b5da872ce6f3c3abe1e8ca1c082f72b"
+dependencies = [
+ "siphasher",
+]
+
 [[package]]
 name = "pin-project-lite"
 version = "0.2.12"
@@ -1974,6 +2044,12 @@ dependencies = [
  "digest",
 ]
 
+[[package]]
+name = "siphasher"
+version = "0.3.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "38b58827f4464d87d377d175e90bf58eb00fd8716ff0a62f80356b5e61555d0d"
+
 [[package]]
 name = "slab"
 version = "0.4.9"