diff --git a/scripts/data_platform/ak_events_wrapper.ps1 b/scripts/data_platform/ak_events_wrapper.ps1
index 9594ae1..9c0742b 100644
--- a/scripts/data_platform/ak_events_wrapper.ps1
+++ b/scripts/data_platform/ak_events_wrapper.ps1
@@ -1,4 +1,4 @@
-# ak_events_wrapper.ps1 — sanguo-ak-events schtask wrapper (daily 19:30 akshare 事件类 per-date 当日)
+# ak_events_wrapper.ps1 — sanguo-ak-events schtask wrapper (daily 19:30 akshare 事件类 per-date 当日)
 # dragon_tiger/block_trade/restricted/zt_pool 三件套/新浪资金流×2/同花顺行业概念/雪球热度/新浪行业对账 --start today --end today;
 # per-date 每类1 unit 快; zt_pool 系 (2026-09-02 双机实测 push2ex 集群稳定) 供情绪/打板因子;
 # hot_rank (东财人气榜) 墙待恢复窗测量, 拍板后加入 --types (fetcher/注册已就位);
@@ -11,7 +11,7 @@ $env:https_proxy = ''
 $env:all_proxy = ''
 Set-Location C:\sanguo_vnpy_v2
 $today = Get-Date -Format yyyyMMdd
-$yesterday = (Get-Date).AddDays(-1) -Format yyyyMMdd
+$yesterday = (Get-Date).AddDays(-1).ToString('yyyyMMdd')
 $ts = Get-Date -Format 'yyyyMMdd_HHmmss'
 $logDir = 'C:\sanguo_vnpy_v2\data\migration_logs'
 if (-not (Test-Path $logDir)) { New-Item -ItemType Directory -Path $logDir -Force | Out-Null }