diff --git a/scripts/_is_trading_day.py b/scripts/_is_trading_day.py
new file mode 100644
index 0000000..2fc8c77
--- /dev/null
+++ b/scripts/_is_trading_day.py
@@ -0,0 +1,46 @@
+"""
+한국 주식 시장 거래일 여부 확인
+exit code 0 = 거래일, 1 = 휴장일
+
+사용:
+    python scripts/_is_trading_day.py
+    if ($LASTEXITCODE -ne 0) { exit }
+"""
+import sys
+from datetime import date
+import holidays
+
+# 라이브러리가 포함하지만 KRX는 개장하는 날 (2008년 이후 제헌절)
+_KRX_OPEN_OVERRIDES = {
+    (7, 17),  # 제헌절 — 2008년부터 공휴일 제외, 장 열림
+}
+
+def is_trading_day(d: date = None) -> tuple[bool, str]:
+    if d is None:
+        d = date.today()
+
+    # 주말
+    if d.weekday() >= 5:
+        return False, "주말"
+
+    kr = holidays.SouthKorea(years=d.year)
+
+    if d in kr:
+        name = kr[d]
+        # KRX 개장 예외 날짜는 무시
+        if (d.month, d.day) in _KRX_OPEN_OVERRIDES:
+            return True, f"개장 (라이브러리 오류 무시: {name})"
+        return False, name
+
+    return True, "거래일"
+
+
+if __name__ == "__main__":
+    today = date.today()
+    trading, reason = is_trading_day(today)
+    if trading:
+        print(f"[거래일] {today} — {reason}")
+        sys.exit(0)
+    else:
+        print(f"[휴장일] {today} — {reason}")
+        sys.exit(1)
diff --git a/scripts/run_bot.ps1 b/scripts/run_bot.ps1
index 6c6a5e4..c3a5ccf 100644
--- a/scripts/run_bot.ps1
+++ b/scripts/run_bot.ps1
@@ -8,10 +8,19 @@ $env:PYTHONIOENCODING = "utf-8"
 $PROJECT = Split-Path -Parent $PSScriptRoot
 $LOG     = "$PROJECT\logs\bot_start.log"
 $CLAUDE  = "C:\Users\whdwo\AppData\Roaming\npm\claude.cmd"
+$PYTHON  = "C:\Users\whdwo\.pyenv\pyenv-win\versions\3.11.9\python.exe"
 $utf8    = New-Object System.Text.UTF8Encoding $false
 
 Set-Location $PROJECT
 
+# 공휴일 체크 — 휴장일이면 스킵
+$holiday_result = & $PYTHON "scripts\_is_trading_day.py" 2>&1
+if ($LASTEXITCODE -ne 0) {
+    $ts = Get-Date -Format "yyyy-MM-dd HH:mm:ss"
+    [System.IO.File]::AppendAllText($LOG, "[$ts] 휴장일 — 스킵 ($holiday_result)`n", $utf8)
+    exit
+}
+
 $timestamp = Get-Date -Format "yyyy-MM-dd HH:mm:ss"
 [System.IO.File]::AppendAllText($LOG, "[$timestamp] /start-bot 실행`n", $utf8)
 
diff --git a/scripts/run_evening.ps1 b/scripts/run_evening.ps1
index cc1b5de..7aabdaf 100644
--- a/scripts/run_evening.ps1
+++ b/scripts/run_evening.ps1
@@ -10,10 +10,19 @@ $env:PYTHONIOENCODING = "utf-8"
 $PROJECT = Split-Path -Parent $PSScriptRoot
 $LOG     = "$PROJECT\logs\evening.log"
 $CLAUDE  = "C:\Users\whdwo\AppData\Roaming\npm\claude.cmd"
+$PYTHON  = "C:\Users\whdwo\.pyenv\pyenv-win\versions\3.11.9\python.exe"
 $utf8    = New-Object System.Text.UTF8Encoding $false
 
 Set-Location $PROJECT
 
+# 공휴일 체크 — 휴장일이면 스킵
+$holiday_result = & $PYTHON "scripts\_is_trading_day.py" 2>&1
+if ($LASTEXITCODE -ne 0) {
+    $ts = Get-Date -Format "yyyy-MM-dd HH:mm:ss"
+    [System.IO.File]::AppendAllText($LOG, "[$ts] 휴장일 — 스킵 ($holiday_result)`n", $utf8)
+    exit
+}
+
 $timestamp = Get-Date -Format "yyyy-MM-dd HH:mm:ss"
 [System.IO.File]::AppendAllText($LOG, "[$timestamp] claude_evening 시작`n", $utf8)
 
diff --git a/scripts/run_midday.ps1 b/scripts/run_midday.ps1
index 3ead57b..a93ce14 100644
--- a/scripts/run_midday.ps1
+++ b/scripts/run_midday.ps1
@@ -10,10 +10,19 @@ $env:PYTHONIOENCODING = "utf-8"
 $PROJECT = Split-Path -Parent $PSScriptRoot
 $LOG     = "$PROJECT\logs\midday.log"
 $CLAUDE  = "C:\Users\whdwo\AppData\Roaming\npm\claude.cmd"
+$PYTHON  = "C:\Users\whdwo\.pyenv\pyenv-win\versions\3.11.9\python.exe"
 $utf8    = New-Object System.Text.UTF8Encoding $false
 
 Set-Location $PROJECT
 
+# 공휴일 체크 — 휴장일이면 스킵
+$holiday_result = & $PYTHON "scripts\_is_trading_day.py" 2>&1
+if ($LASTEXITCODE -ne 0) {
+    $ts = Get-Date -Format "yyyy-MM-dd HH:mm:ss"
+    [System.IO.File]::AppendAllText($LOG, "[$ts] 휴장일 — 스킵 ($holiday_result)`n", $utf8)
+    exit
+}
+
 $timestamp = Get-Date -Format "yyyy-MM-dd HH:mm:ss"
 [System.IO.File]::AppendAllText($LOG, "[$timestamp] claude_midday 시작`n", $utf8)
 
diff --git a/scripts/run_morning.ps1 b/scripts/run_morning.ps1
index eec24b6..e7878cd 100644
--- a/scripts/run_morning.ps1
+++ b/scripts/run_morning.ps1
@@ -10,10 +10,19 @@ $env:PYTHONIOENCODING = "utf-8"
 $PROJECT = Split-Path -Parent $PSScriptRoot
 $LOG     = "$PROJECT\logs\morning.log"
 $CLAUDE  = "C:\Users\whdwo\AppData\Roaming\npm\claude.cmd"
+$PYTHON  = "C:\Users\whdwo\.pyenv\pyenv-win\versions\3.11.9\python.exe"
 $utf8    = New-Object System.Text.UTF8Encoding $false
 
 Set-Location $PROJECT
 
+# 공휴일 체크 — 휴장일이면 스킵
+$holiday_result = & $PYTHON "scripts\_is_trading_day.py" 2>&1
+if ($LASTEXITCODE -ne 0) {
+    $ts = Get-Date -Format "yyyy-MM-dd HH:mm:ss"
+    [System.IO.File]::AppendAllText($LOG, "[$ts] 휴장일 — 스킵 ($holiday_result)`n", $utf8)
+    exit
+}
+
 $timestamp = Get-Date -Format "yyyy-MM-dd HH:mm:ss"
 [System.IO.File]::AppendAllText($LOG, "[$timestamp] claude_morning 시작`n", $utf8)