diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1f44102..a748bef 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -58,6 +58,7 @@ include_directories(password-analyzer PRIVATE ${CMAKE_BINARY_DIR}/external)
 set(COMMON_SOURCES
         defs.hpp
         utils.cpp
+        stat_date.cpp
         stat_keystroke.cpp
         stat_length.cpp
         stat_struct.cpp
diff --git a/analyzer.cpp b/analyzer.cpp
index 13b7c0a..7e436c3 100644
--- a/analyzer.cpp
+++ b/analyzer.cpp
@@ -10,5 +10,8 @@ int main() {
     stat_keystroke(DataSource::YAHOO);
     stat_keystroke(DataSource::CSDN);
 
+    stat_date(DataSource::YAHOO);
+    stat_date(DataSource::CSDN);
+
     return 0;
 }
diff --git a/defs.hpp b/defs.hpp
index 10c8207..02fcec9 100644
--- a/defs.hpp
+++ b/defs.hpp
@@ -26,6 +26,7 @@ bool is_alpha(char c);
 
 std::generator<std::string> passwords(const DataSource &source);
 
+void stat_date(const DataSource &source);
 void stat_keystroke(const DataSource &source);
 void stat_length(const DataSource &source);
 void stat_struct(const DataSource &source);
diff --git a/stat_date.cpp b/stat_date.cpp
new file mode 100644
index 0000000..9072210
--- /dev/null
+++ b/stat_date.cpp
@@ -0,0 +1,67 @@
+#include <map>
+#include <regex>
+#include <vector>
+#include "defs.hpp"
+
+const std::regex date_match[] = {
+    // YYYY MM DD
+    std::regex(R"((?:19|20)\d{2}(?:0[1-9]|1[0-2])(?:0[1-9]|[1-2][0-9]|3[0-1]))"),
+    std::regex(R"((?:19|20)\d{2}\.(?:0[1-9]|1[0-2])\.(?:0[1-9]|[1-2][0-9]|3[0-1]))"),
+    std::regex(R"((?:19|20)\d{2}-(?:0[1-9]|1[0-2])-(?:0[1-9]|[1-2][0-9]|3[0-1]))"),
+    std::regex(R"((?:19|20)\d{2}/(?:0[1-9]|1[0-2])/(?:0[1-9]|[1-2][0-9]|3[0-1]))"),
+    // MM DD YYYY
+    std::regex(R"((?:0[1-9]|1[0-2])(?:0[1-9]|[1-2][0-9]|3[0-1])(?:19|20)\d{2})"),
+    std::regex(R"((?:0[1-9]|1[0-2])\.(?:0[1-9]|[1-2][0-9]|3[0-1])\.(?:19|20)\d{2})"),
+    std::regex(R"((?:0[1-9]|1[0-2])-(?:0[1-9]|[1-2][0-9]|3[0-1])-(?:19|20)\d{2})"),
+    std::regex(R"((?:0[1-9]|1[0-2])/(?:0[1-9]|[1-2][0-9]|3[0-1])/(?:19|20)\d{2})"),
+    // YY MM DD
+    std::regex(R"(\d{2}(?:0[1-9]|1[0-2])(?:0[1-9]|[1-2][0-9]|3[0-1]))"),
+    std::regex(R"(\d{2}\.(?:0[1-9]|1[0-2])\.(?:0[1-9]|[1-2][0-9]|3[0-1]))"),
+    std::regex(R"(\d{2}-(?:0[1-9]|1[0-2])-(?:0[1-9]|[1-2][0-9]|3[0-1]))"),
+    std::regex(R"(\d{2}/(?:0[1-9]|1[0-2])/(?:0[1-9]|[1-2][0-9]|3[0-1]))"),
+    // MM DD YY
+    std::regex(R"((?:0[1-9]|1[0-2])(?:0[1-9]|[1-2][0-9]|3[0-1])\d{2})"),
+    std::regex(R"((?:0[1-9]|1[0-2])\.(?:0[1-9]|[1-2][0-9]|3[0-1])\.\d{2})"),
+    std::regex(R"((?:0[1-9]|1[0-2])-(?:0[1-9]|[1-2][0-9]|3[0-1])-\d{2})"),
+    std::regex(R"((?:0[1-9]|1[0-2])/(?:0[1-9]|[1-2][0-9]|3[0-1])/\d{2})"),
+    // MM DD
+    std::regex(R"((?:0[1-9]|1[0-2])(?:0[1-9]|[1-2][0-9]|3[0-1]))"),
+    std::regex(R"((?:0[1-9]|1[0-2])\.(?:0[1-9]|[1-2][0-9]|3[0-1]))"),
+    std::regex(R"((?:0[1-9]|1[0-2])-(?:0[1-9]|[1-2][0-9]|3[0-1]))"),
+    std::regex(R"((?:0[1-9]|1[0-2])/(?:0[1-9]|[1-2][0-9]|3[0-1]))"),
+};
+
+void stat_date(const DataSource &source) {
+    spdlog::info("stat_date({})", magic_enum::enum_name(source));
+
+    std::map<std::string, size_t> date_map;
+    std::map<size_t, size_t>      type_map;
+
+    for (auto const &password : passwords(source)) {
+        for (int i = 0; i < sizeof(date_match) / sizeof(date_match[0]); i++) {
+            const auto &match = date_match[i];
+            auto        bgn   = std::sregex_iterator(password.begin(), password.end(), match);
+            auto        end   = std::sregex_iterator();
+
+            if (bgn != end) {
+                auto date = bgn->str();
+                date_map[date]++;
+                type_map[i]++;
+                break;
+            }
+        }
+    }
+
+    std::vector<std::pair<std::string, size_t>> date_vec(date_map.begin(), date_map.end());
+    std::vector<std::pair<size_t, size_t>>      type_vec(type_map.begin(), type_map.end());
+    std::sort(date_vec.begin(), date_vec.end(), [](auto const &a, auto const &b) { return a.second > b.second; });
+    std::sort(type_vec.begin(), type_vec.end(), [](auto const &a, auto const &b) { return a.second > b.second; });
+
+    for (auto &&[date, count] : date_vec | std::views::take(10)) {
+        spdlog::info("{}: {}", date, count);
+    }
+
+    for (auto &&[type, count] : type_vec | std::views::take(10)) {
+        spdlog::info("{}: {}", type, count);
+    }
+}