diff --git a/tonecn/src/lib/timestampToString.ts b/tonecn/src/lib/timestampToString.ts
new file mode 100644
index 0000000..28b8c34
--- /dev/null
+++ b/tonecn/src/lib/timestampToString.ts
@@ -0,0 +1,46 @@
+
+function timestampToString(timestamp: string | number) {
+    if (timestamp === undefined || timestamp === null) {
+        throw new Error('Timestamp cannot be undefined or null');
+    }
+
+    const date = new Date(+timestamp);
+
+    const year = date.getFullYear();
+    const month = String(date.getMonth() + 1).padStart(2, '0'); // getMonth() returns 0-11, so we add 1
+    const day = String(date.getDate()).padStart(2, '0');
+    const hours = String(date.getHours()).padStart(2, '0');
+    const minutes = String(date.getMinutes()).padStart(2, '0');
+    const seconds = String(date.getSeconds()).padStart(2, '0');
+
+    return `${year}/${month}/${day} ${hours}:${minutes}:${seconds}`;
+}
+
+function timestampToRelativeWeekday(timestamp: string | number) {
+    if (timestamp === undefined || timestamp === null) {
+        throw new Error('Timestamp cannot be undefined or null');
+    }
+
+    const date = new Date(+timestamp);
+    const today = new Date();
+    today.setHours(0, 0, 0, 0); // 设置为今天的零点，以便于比较
+
+    // 判断是否为明天
+    const date0000 = new Date(date);
+    date0000.setHours(0, 0, 0, 0);
+    const isTomorrow = date0000.getTime() === today.getTime() + 24 * 60 * 60 * 1000;
+    const isToday = date0000.getTime() === today.getTime();
+
+    // 获取星期几，注意JavaScript的getDay()返回值是0（周日）到6（周六）
+    const weekday = ['星期日', '星期一', '星期二', '星期三', '星期四', '星期五', '星期六'][date.getDay()];
+
+    if (isToday) {
+        return '今天';
+    } else if (isTomorrow) {
+        return '明天';
+    } else {
+        return weekday;
+    }
+}
+
+export { timestampToString, timestampToRelativeWeekday }
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