diff --git a/static/chart_main/sevencoin.js b/static/chart_main/sevencoin.js
index 7fa08ee..29ed30e 100644
--- a/static/chart_main/sevencoin.js
+++ b/static/chart_main/sevencoin.js
@@ -277,8 +277,17 @@ $(function () {
 		adjustToEasternTime(date) {
 			let timestamp;
 					
-			// 调整时间为美国东部时间
-			timestamp = date - (-28800000)+(new Date(new Date().getTime()).getTimezoneOffset()* 60 * 1000) - 46800000;
+			// 判断日期是否在夏令时
+			const dates = new Date(date);
+			const isInEDT = this.dateIsInEDT(dates);
+			// 根据是否在夏令时来调整时间
+			if (isInEDT) {
+			    // 在夏令时期间
+			    timestamp = date - (-28800000)+(new Date(new Date().getTime()).getTimezoneOffset()* 60 * 1000) - 43200000; // 使用43200000毫秒 = 12小时
+			} else {
+			    // 在冬令时期间
+			    timestamp = date - (-28800000)+(new Date(new Date().getTime()).getTimezoneOffset()* 60 * 1000) - 46800000; // 使用46800000毫秒 = 13小时
+			}
 			// 创建新的日期对象，并使用调整后的时间戳
 			const adjustedDate = new Date(timestamp);
 					
@@ -288,9 +297,8 @@ $(function () {
 		// 判断日期是否在夏令时（简化的逻辑，实际应用中需要考虑更多的边界情况）
 		dateIsInEDT(date) {
 		    const year = date.getUTCFullYear();
-		    const start = new Date(Date.UTC(year, 2, 13, 7)); // March, 2nd Sunday
-		    const end = new Date(Date.UTC(year, 10, 6, 6)); // November, 1st Sunday
-		    
+		    const start = new Date(Date.UTC(year, 2, 8, 18)); // March, 2nd Sunday
+		    const end = new Date(Date.UTC(year, 10, 3, 18)); // November, 1st Sunday
 		    start.setUTCDate(14 - start.getUTCDay());
 		    end.setUTCDate(7 - end.getUTCDay());