diff --git a/Cargo.lock b/Cargo.lock
index 1b59015..5482b3e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,6 +2,15 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "aho-corasick"
+version = "0.6.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "81ce3d38065e618af2d7b77e10c5ad9a069859b4be3c2250f674af3840d9c8a5"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "aho-corasick"
 version = "0.7.18"
@@ -61,8 +70,9 @@ name = "cal8tor"
 version = "0.1.0"
 dependencies = [
  "chrono",
+ "chrono-tz",
  "ics",
- "regex",
+ "regex 1.6.0",
  "reqwest",
  "scraper",
  "tokio",
@@ -95,6 +105,16 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "chrono-tz"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aa1878c18b5b01b9978d5f130fe366d434022004d12fb87c182e8459b427c4a3"
+dependencies = [
+ "chrono",
+ "parse-zoneinfo",
+]
+
 [[package]]
 name = "convert_case"
 version = "0.4.0"
@@ -725,6 +745,15 @@ dependencies = [
  "windows-sys",
 ]
 
+[[package]]
+name = "parse-zoneinfo"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f4ee19a3656dadae35a33467f9714f1228dd34766dbe49e10e656b5296867aea"
+dependencies = [
+ "regex 0.2.11",
+]
+
 [[package]]
 name = "percent-encoding"
 version = "2.1.0"
@@ -967,15 +996,37 @@ dependencies = [
  "bitflags",
 ]
 
+[[package]]
+name = "regex"
+version = "0.2.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9329abc99e39129fcceabd24cf5d85b4671ef7c29c50e972bc5afe32438ec384"
+dependencies = [
+ "aho-corasick 0.6.10",
+ "memchr",
+ "regex-syntax 0.5.6",
+ "thread_local",
+ "utf8-ranges",
+]
+
 [[package]]
 name = "regex"
 version = "1.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4c4eb3267174b8c6c2f654116623910a0fef09c4753f8dd83db29c48a0df988b"
 dependencies = [
- "aho-corasick",
+ "aho-corasick 0.7.18",
  "memchr",
- "regex-syntax",
+ "regex-syntax 0.6.27",
+]
+
+[[package]]
+name = "regex-syntax"
+version = "0.5.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7d707a4fa2637f2dca2ef9fd02225ec7661fe01a53623c1e6515b6916511f7a7"
+dependencies = [
+ "ucd-util",
 ]
 
 [[package]]
@@ -1279,6 +1330,15 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8eaa81235c7058867fa8c0e7314f33dcce9c215f535d1913822a2b3f5e289f3c"
 
+[[package]]
+name = "thread_local"
+version = "0.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c6b53e329000edc2b34dbe8545fd20e55a333362d0a321909685a19bd28c3f1b"
+dependencies = [
+ "lazy_static",
+]
+
 [[package]]
 name = "time"
 version = "0.1.44"
@@ -1393,6 +1453,12 @@ version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "59547bce71d9c38b83d9c0e92b6066c4253371f15005def0c30d9657f50c7642"
 
+[[package]]
+name = "ucd-util"
+version = "0.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "65bfcbf611b122f2c10eb1bb6172fbc4c2e25df9970330e4d75ce2b5201c9bfc"
+
 [[package]]
 name = "unicode-bidi"
 version = "0.3.8"
@@ -1438,6 +1504,12 @@ version = "0.7.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "09cc8ee72d2a9becf2f2febe0205bbed8fc6615b7cb429ad062dc7b7ddd036a9"
 
+[[package]]
+name = "utf8-ranges"
+version = "1.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7fcfc827f90e53a02eaef5e535ee14266c1d569214c6aa70133a624d8a3164ba"
+
 [[package]]
 name = "vcpkg"
 version = "0.2.15"
diff --git a/Cargo.toml b/Cargo.toml
index b6bc33b..eba1d6d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,4 +11,5 @@ tokio = { version = "1", features = ["full"] }
 scraper = "0.13.0"
 regex = "1"
 chrono = "0.4"
+chrono-tz = "0.4"
 ics = "0.5"