diff --git a/esphome/components/web_server/web_server.cpp b/esphome/components/web_server/web_server.cpp
index d2484601fb..87f0827284 100644
--- a/esphome/components/web_server/web_server.cpp
+++ b/esphome/components/web_server/web_server.cpp
@@ -1175,12 +1175,13 @@ void WebServer::handle_date_request(AsyncWebServerRequest *request, const UrlMat
 
     auto call = obj->make_call();
 
-    if (!request->hasArg(ESPHOME_F("value"))) {
+    // .c_str() is required for Arduino framework where arg() returns Arduino String instead of std::string
+    std::string value = request->arg(ESPHOME_F("value")).c_str();  // NOLINT(readability-redundant-string-cstr)
+    if (value.empty()) {
       request->send(409);
       return;
     }
-
-    parse_string_param_(request, ESPHOME_F("value"), call, &decltype(call)::set_date);
+    call.set_date(value);
 
     DEFER_ACTION(call, call.perform());
     request->send(200);
@@ -1235,12 +1236,13 @@ void WebServer::handle_time_request(AsyncWebServerRequest *request, const UrlMat
 
     auto call = obj->make_call();
 
-    if (!request->hasArg(ESPHOME_F("value"))) {
+    // .c_str() is required for Arduino framework where arg() returns Arduino String instead of std::string
+    std::string value = request->arg(ESPHOME_F("value")).c_str();  // NOLINT(readability-redundant-string-cstr)
+    if (value.empty()) {
       request->send(409);
       return;
     }
-
-    parse_string_param_(request, ESPHOME_F("value"), call, &decltype(call)::set_time);
+    call.set_time(value);
 
     DEFER_ACTION(call, call.perform());
     request->send(200);
@@ -1294,12 +1296,13 @@ void WebServer::handle_datetime_request(AsyncWebServerRequest *request, const Ur
 
     auto call = obj->make_call();
 
-    if (!request->hasArg(ESPHOME_F("value"))) {
+    // .c_str() is required for Arduino framework where arg() returns Arduino String instead of std::string
+    std::string value = request->arg(ESPHOME_F("value")).c_str();  // NOLINT(readability-redundant-string-cstr)
+    if (value.empty()) {
       request->send(409);
       return;
     }
-
-    parse_string_param_(request, ESPHOME_F("value"), call, &decltype(call)::set_datetime);
+    call.set_datetime(value);
 
     DEFER_ACTION(call, call.perform());
     request->send(200);
diff --git a/esphome/components/web_server/web_server.h b/esphome/components/web_server/web_server.h
index 547164d470..4ef8fb55f1 100644
--- a/esphome/components/web_server/web_server.h
+++ b/esphome/components/web_server/web_server.h
@@ -544,9 +544,9 @@ class WebServer : public Controller,
   template<typename T, typename Ret>
   void parse_string_param_(AsyncWebServerRequest *request, ParamNameType param_name, T &call,
                            Ret (T::*setter)(const std::string &)) {
-    if (request->hasArg(param_name)) {
-      // .c_str() is required for Arduino framework where arg() returns Arduino String instead of std::string
-      std::string value = request->arg(param_name).c_str();  // NOLINT(readability-redundant-string-cstr)
+    // .c_str() is required for Arduino framework where arg() returns Arduino String instead of std::string
+    std::string value = request->arg(param_name).c_str();  // NOLINT(readability-redundant-string-cstr)
+    if (!value.empty()) {
       (call.*setter)(value);
     }
   }