diff --git a/bits/20_jsutils.js b/bits/20_jsutils.js
index 0dd0676..a36c9c5 100644
--- a/bits/20_jsutils.js
+++ b/bits/20_jsutils.js
@@ -133,8 +133,8 @@ function fuzzydate(s/*:string*/)/*:Date*/ {
 	if(y < 0 || y > 8099) return n;
 	if((m > 0 || d > 1) && y != 101) return o;
 	if(s.toLowerCase().match(/jan|feb|mar|apr|may|jun|jul|aug|sep|oct|nov|dec/)) return o;
-	if(s.match(/[^-0-9:,\/\\]/)) return o;
-	return n;
+	if(s.match(/[^-0-9:,\/\\]/)) return n;
+	return o;
 }
 
 var safe_split_regex = "abacaba".split(/(:?b)/i).length == 5;
diff --git a/xlsx.flow.js b/xlsx.flow.js
index be57790..038b89b 100644
--- a/xlsx.flow.js
+++ b/xlsx.flow.js
@@ -1600,8 +1600,8 @@ function fuzzydate(s/*:string*/)/*:Date*/ {
 	if(y < 0 || y > 8099) return n;
 	if((m > 0 || d > 1) && y != 101) return o;
 	if(s.toLowerCase().match(/jan|feb|mar|apr|may|jun|jul|aug|sep|oct|nov|dec/)) return o;
-	if(s.match(/[^-0-9:,\/\\]/)) return o;
-	return n;
+	if(s.match(/[^-0-9:,\/\\]/)) return n;
+	return o;
 }
 
 var safe_split_regex = "abacaba".split(/(:?b)/i).length == 5;
diff --git a/xlsx.js b/xlsx.js
index 8a1e62b..8ee8c93 100644
--- a/xlsx.js
+++ b/xlsx.js
@@ -1537,8 +1537,8 @@ function fuzzydate(s) {
 	if(y < 0 || y > 8099) return n;
 	if((m > 0 || d > 1) && y != 101) return o;
 	if(s.toLowerCase().match(/jan|feb|mar|apr|may|jun|jul|aug|sep|oct|nov|dec/)) return o;
-	if(s.match(/[^-0-9:,\/\\]/)) return o;
-	return n;
+	if(s.match(/[^-0-9:,\/\\]/)) return n;
+	return o;
 }
 
 var safe_split_regex = "abacaba".split(/(:?b)/i).length == 5;