diff --git a/webmail/webmail.js b/webmail/webmail.js
index 1565be4..7b6fff8 100644
--- a/webmail/webmail.js
+++ b/webmail/webmail.js
@@ -1866,8 +1866,9 @@ const parseSearchDateTime = (s, isstart) => {
 		return d ? d.toJSON() : undefined;
 	}
 	else if (t.length === 1) {
-		if (isNaN(Date.parse(fixDate(t[0])))) {
-			const d = new Date(fixDate(t[0]));
+		const fds = fixDate(t[0]);
+		if (!isNaN(Date.parse(fds))) {
+			const d = new Date(fds);
 			if (!isstart) {
 				d.setDate(d.getDate() + 1);
 			}
diff --git a/webmail/webmail.ts b/webmail/webmail.ts
index 190fe03..aecc709 100644
--- a/webmail/webmail.ts
+++ b/webmail/webmail.ts
@@ -486,8 +486,9 @@ const parseSearchDateTime = (s: string, isstart: boolean): string | undefined =>
 		const d = new Date(fixDate(t[0]) + 'T'+t[1])
 		return d ? d.toJSON() : undefined
 	} else if (t.length === 1) {
-		if (isNaN(Date.parse(fixDate(t[0])))) {
-			const d = new Date(fixDate(t[0]))
+		const fds = fixDate(t[0])
+		if (!isNaN(Date.parse(fds))) {
+			const d = new Date(fds)
 			if (!isstart) {
 				d.setDate(d.getDate()+1)
 			}