diff --git a/include/modules/clock.hpp b/include/modules/clock.hpp
index 17752e4d..9f950192 100644
--- a/include/modules/clock.hpp
+++ b/include/modules/clock.hpp
@@ -17,6 +17,8 @@ struct waybar_time {
   date::zoned_seconds ztime;
 };
 
+const std::string kCalendarPlaceholder = "calendar";
+
 class Clock : public ALabel {
  public:
   Clock(const std::string&, const Json::Value&);
@@ -26,18 +28,19 @@ class Clock : public ALabel {
  private:
   util::SleeperThread thread_;
   std::locale locale_;
-  const date::time_zone* time_zone_;
-  bool fixed_time_zone_;
-  int time_zone_idx_;
+  std::vector<const date::time_zone*> time_zones_;
+  int current_time_zone_idx_;
   date::year_month_day cached_calendar_ymd_ = date::January/1/0;
   std::string cached_calendar_text_;
+  bool is_calendar_in_tooltip_;
 
   bool handleScroll(GdkEventScroll* e);
 
   auto calendar_text(const waybar_time& wtime) -> std::string;
   auto weekdays_header(const date::weekday& first_dow, std::ostream& os) -> void;
   auto first_day_of_week() -> date::weekday;
-  bool setTimeZone(Json::Value zone_name);
+  const date::time_zone* current_timezone();
+  bool is_timezone_fixed();
 };
 
 }  // namespace waybar::modules
diff --git a/src/modules/clock.cpp b/src/modules/clock.cpp
index 7c94c457..7e7d7420 100644
--- a/src/modules/clock.cpp
+++ b/src/modules/clock.cpp
@@ -14,17 +14,51 @@
 using waybar::modules::waybar_time;
 
 waybar::modules::Clock::Clock(const std::string& id, const Json::Value& config)
-    : ALabel(config, "clock", id, "{:%H:%M}", 60, false, false, true), fixed_time_zone_(false) {
+    : ALabel(config, "clock", id, "{:%H:%M}", 60, false, false, true),
+      current_time_zone_idx_(0),
+      is_calendar_in_tooltip_(false)
+{
   if (config_["timezones"].isArray() && !config_["timezones"].empty()) {
-    time_zone_idx_ = 0;
-    setTimeZone(config_["timezones"][time_zone_idx_]);
-  } else {
-    setTimeZone(config_["timezone"]);
+    for (const auto& zone_name: config_["timezones"]) {
+      if (!zone_name.isString() || zone_name.asString().empty()) {
+        time_zones_.push_back(nullptr);
+        continue;
+      }
+      time_zones_.push_back(
+        date::locate_zone(
+          zone_name.asString()
+        )
+      );
+    }
+  } else if (config_["timezone"].isString() && !config_["timezone"].asString().empty()) {
+    time_zones_.push_back(
+        date::locate_zone(
+          config_["timezone"].asString()
+        )
+      );
   }
-  if (fixed_time_zone_) {
+
+  // If all timezones are parsed and no one is good, add nullptr to the timezones vector, to mark that local time should be shown.
+  if (!time_zones_.size()) {
+    time_zones_.push_back(nullptr);
+  }
+
+  if (!is_timezone_fixed()) {
     spdlog::warn("As using a timezone, some format args may be missing as the date library haven't got a release since 2018.");
   }
 
+  // Check if a particular placeholder is present in the tooltip format, to know what to calculate on update.
+  if (config_["tooltip-format"].isString()) {
+    std::string trimmed_format = config_["tooltip-format"].asString();
+    trimmed_format.erase(std::remove_if(trimmed_format.begin(),
+                              trimmed_format.end(),
+                              [](unsigned char x){return std::isspace(x);}),
+               trimmed_format.end());
+    if (trimmed_format.find("{" + kCalendarPlaceholder + "}") != std::string::npos) {
+      is_calendar_in_tooltip_ = true;
+    }
+  }
+
   if (config_["locale"].isString()) {
     locale_ = std::locale(config_["locale"].asString());
   } else {
@@ -40,53 +74,46 @@ waybar::modules::Clock::Clock(const std::string& id, const Json::Value& config)
   };
 }
 
+const date::time_zone* waybar::modules::Clock::current_timezone() {
+  return time_zones_[current_time_zone_idx_] ? time_zones_[current_time_zone_idx_] : date::current_zone();
+}
+
+bool waybar::modules::Clock::is_timezone_fixed() {
+  return time_zones_[current_time_zone_idx_] != nullptr;
+}
+
 auto waybar::modules::Clock::update() -> void {
-  if (!fixed_time_zone_) {
-    // Time zone can change. Be sure to pick that.
-    time_zone_ = date::current_zone();
-  }
-
-  auto        now = std::chrono::system_clock::now();
+  auto time_zone = current_timezone();
+  auto now = std::chrono::system_clock::now();
   waybar_time wtime = {locale_,
-                       date::make_zoned(time_zone_, date::floor<std::chrono::seconds>(now))};
-
-  std::string text;
-  if (!fixed_time_zone_) {
+                       date::make_zoned(time_zone, date::floor<std::chrono::seconds>(now))};
+  std::string text = "";
+  if (!is_timezone_fixed()) {
     // As date dep is not fully compatible, prefer fmt
     tzset();
     auto localtime = fmt::localtime(std::chrono::system_clock::to_time_t(now));
     text = fmt::format(format_, localtime);
-    label_.set_markup(text);
   } else {
     text = fmt::format(format_, wtime);
-    label_.set_markup(text);
   }
+  label_.set_markup(text);
 
   if (tooltipEnabled()) {
     if (config_["tooltip-format"].isString()) {
-      const auto calendar = calendar_text(wtime);
-      auto       tooltip_format = config_["tooltip-format"].asString();
-      auto       tooltip_text = fmt::format(tooltip_format, wtime, fmt::arg("calendar", calendar));
-      label_.set_tooltip_markup(tooltip_text);
-    } else {
-      label_.set_tooltip_markup(text);
+      std::string calendar_lines = "";
+      if (is_calendar_in_tooltip_) {
+        calendar_lines = calendar_text(wtime);
+      }
+      auto tooltip_format = config_["tooltip-format"].asString();
+      text = fmt::format(tooltip_format, wtime, fmt::arg(kCalendarPlaceholder.c_str(), calendar_lines));
     }
   }
+
+  label_.set_tooltip_markup(text);
   // Call parent update
   ALabel::update();
 }
 
-bool waybar::modules::Clock::setTimeZone(Json::Value zone_name) {
-  if (!zone_name.isString() || zone_name.asString().empty()) {
-      fixed_time_zone_ = false;
-      return false;
-  }
-
-  time_zone_ = date::locate_zone(zone_name.asString());
-  fixed_time_zone_ = true;
-  return true;
-}
-
 bool waybar::modules::Clock::handleScroll(GdkEventScroll *e) {
   // defer to user commands if set
   if (config_["on-scroll-up"].isString() || config_["on-scroll-down"].isString()) {
@@ -97,17 +124,18 @@ bool waybar::modules::Clock::handleScroll(GdkEventScroll *e) {
   if (dir != SCROLL_DIR::UP && dir != SCROLL_DIR::DOWN) {
     return true;
   }
-  if (!config_["timezones"].isArray() || config_["timezones"].empty()) {
+  if (time_zones_.size() == 1) {
     return true;
   }
-  auto nr_zones = config_["timezones"].size();
+
+  auto nr_zones = time_zones_.size();
   if (dir == SCROLL_DIR::UP) {
-    size_t new_idx = time_zone_idx_ + 1;
-    time_zone_idx_ = new_idx == nr_zones ? 0 : new_idx;
+    size_t new_idx = current_time_zone_idx_ + 1;
+    current_time_zone_idx_ = new_idx == nr_zones ? 0 : new_idx;
   } else {
-    time_zone_idx_ = time_zone_idx_ == 0 ? nr_zones - 1 : time_zone_idx_ - 1;
+    current_time_zone_idx_ = current_time_zone_idx_ == 0 ? nr_zones - 1 : current_time_zone_idx_ - 1;
   }
-  setTimeZone(config_["timezones"][time_zone_idx_]);
+
   update();
   return true;
 }