diff --git a/puppy/Dockerfile b/puppy/Dockerfile
index a973673..300c1d9 100644
--- a/puppy/Dockerfile
+++ b/puppy/Dockerfile
@@ -16,7 +16,6 @@ COPY include include
 COPY src src
 COPY CMakeLists.txt .
 
-
 RUN --mount=type=cache,target=cmake-build cmake -B cmake-build \
     -DCMAKE_CXX_COMPILER=i686-w64-mingw32-g++ && cmake --build cmake-build -j$(nproc) && \
     cp cmake-build/promt-puppy.exe .;
diff --git a/puppy/app/main.cpp b/puppy/app/main.cpp
index f1874a6..13a52b2 100644
--- a/puppy/app/main.cpp
+++ b/puppy/app/main.cpp
@@ -1,15 +1,57 @@
 #include "http/httplib.h"
 
 #include <csignal>
+#include <cstdint>
+#include <cstdlib>
 #include <filesystem>
 #include <fstream>
 #include <functional>
 #include <iostream>
 #include <mutex>
+#include <windows.h>
+#include <winternl.h>
 
 #include "PromtCtlDocument.hpp"
 #include "PromtFTManager.hpp"
 
+#define EPOCH_DIFF 116444736000000000LL
+#define TICKS_PER_SEC 10000000LL
+
+static LARGE_INTEGER fake_time;
+
+static NTSTATUS WINAPI HookedNtQuerySystemTime(PLARGE_INTEGER time)
+{
+    if (time)
+        time->QuadPart = fake_time.QuadPart;
+
+    fake_time.QuadPart += TICKS_PER_SEC;
+    return 0;
+}
+
+static void InstallTimeHook()
+{
+    HMODULE ntdll = GetModuleHandleA("ntdll.dll");
+    if (!ntdll)
+        return;
+
+    auto target = (BYTE *)GetProcAddress(ntdll, "NtQuerySystemTime");
+    if (!target)
+        return;
+
+    DWORD old;
+    VirtualProtect(target, 5, PAGE_EXECUTE_READWRITE, &old);
+
+    intptr_t rel = (BYTE *)HookedNtQuerySystemTime - target - 5;
+    target[0] = 0xE9; // jmp rel32
+    *(int32_t *)(target + 1) = (int32_t)rel;
+
+    VirtualProtect(target, 5, old, &old);
+
+    const char *env = std::getenv("FAKETIME");
+    long long unix_ts = env ? std::strtoll(env, nullptr, 10) : 0;
+    fake_time.QuadPart = unix_ts * TICKS_PER_SEC + EPOCH_DIFF;
+}
+
 static inline std::string random_filename(int len = 65) {
     static const char ASCII_PRINTABLE[] = "1234567890ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
     static std::random_device random_device;
@@ -189,6 +231,8 @@ void signal_handler(int signal) {
 }
 
 int main() {
+    InstallTimeHook();
+
     CoInitializeEx(NULL, COINIT_MULTITHREADED);
     CoInitializeSecurity(nullptr, -1, nullptr, nullptr, RPC_C_AUTHN_LEVEL_NONE, RPC_C_IMP_LEVEL_IDENTIFY, nullptr, EOAC_NONE, nullptr);
 
diff --git a/puppy/docker-entrypoint.sh b/puppy/docker-entrypoint.sh
index 5209beb..82cd9b6 100755
--- a/puppy/docker-entrypoint.sh
+++ b/puppy/docker-entrypoint.sh
@@ -1,8 +1,12 @@
 #!/bin/bash
+# shellcheck disable=SC2155
 
 echo 'initializing wine...'
 wineboot -i
+
 echo 'copying registy values...'
-wine regedit $WINEPREFIX/drive_c/registry.reg
-echo 'starting...'
+wine regedit "$WINEPREFIX"/drive_c/registry.reg
+
+export FAKETIME="$(cat "$WINEPREFIX"/drive_c/build-date)"
+echo "starting with date $(date -d @"$FAKETIME")..."
 exec wine /app/promt-puppy.exe
diff --git a/puppy/scripts/prepare_envirionment.sh b/puppy/scripts/prepare_envirionment.sh
index 64bc9a3..df8a9a3 100755
--- a/puppy/scripts/prepare_envirionment.sh
+++ b/puppy/scripts/prepare_envirionment.sh
@@ -21,3 +21,5 @@ winetricks_init
 winetricks_vcrun6_helper
 w_try_cabextract "${W_CACHE}"/vcrun6/vcredist.exe -d "$SCRIPT_DIR/build/windows/" -F "mfc42*.dll"
 mkdir -p "$SCRIPT_DIR/build/windows/system32"
+
+date +'%s' > "$SCRIPT_DIR/build/build-date"