diff --git a/README.md b/README.md
index 54a62d2a..1b0723ed 100644
--- a/README.md
+++ b/README.md
@@ -39,6 +39,7 @@ is(13).thirteen(); // true
 is(12.8).roughly.thirteen(); // true
 is(6).within(10).of.thirteen(); // true
 is(2008).yearOfBirth(); // true
+is(new Date("2020-03-13")).friday13th(); // true
 
 // check your math skillz
 is(4).plus(5).thirteen();      // false
diff --git a/consts.js b/consts.js
index 365d5ca9..9d2153c3 100644
--- a/consts.js
+++ b/consts.js
@@ -2,6 +2,7 @@
 
 const THIRTEEN = 13;
 const THIRTEEN_FUZZ = 0.5;
+const FRIDAY = 5;
 
 var thirteenStrings = [
     "xiii", // Roman numeral 13
@@ -354,5 +355,6 @@ var thirteenStrings = [
 module.exports = {
     THIRTEEN: THIRTEEN,
     THIRTEEN_FUZZ: THIRTEEN_FUZZ,
+    FRIDAY: FRIDAY,
     thirteenStrings: thirteenStrings
 };
diff --git a/is.js b/is.js
index 9877f807..cb0df9c6 100644
--- a/is.js
+++ b/is.js
@@ -3,6 +3,7 @@ var consts = require('./consts');
 
 const THIRTEEN = consts.THIRTEEN;
 const THIRTEEN_FUZZ = consts.THIRTEEN_FUZZ;
+const FRIDAY = consts.FRIDAY;
 const thirteenStrings = consts.thirteenStrings;
 
 'use strict';
@@ -107,6 +108,12 @@ var is = function is(x) {
             }
             return currYear - parseInt(x) == THIRTEEN
         },
+        friday13th: function() {
+            if (Object.prototype.toString.call(x) !== '[object Date]') {
+                return false;
+            }
+            return x.getDay() === FRIDAY && x.getDate() === THIRTEEN;
+        },
         plus: function(y) {
             return is(x + y);
         },
diff --git a/test.js b/test.js
index 851648cf..eebc2034 100644
--- a/test.js
+++ b/test.js
@@ -36,6 +36,11 @@ tap.equal(is("https://www.imdb.com/title/tt2991516/").thirteen(), true);
 //year of birth test
 tap.equal(is("2003").yearOfBirth(), false);
 
+// Friday 13th test
+tap.equal(is("not a date").friday13th(), false);
+tap.equal(is(new Date("2020-06-13")).friday13th(), false);
+tap.equal(is(new Date("2018-07-13")).friday13th(), true);
+
 // Imaginary 13's tests
 tap.equal(is("13+0i").thirteen(), true);
 tap.equal(is("13i").thirteen(), true);