diff --git a/src/convert/convert.js b/src/convert/convert.js
index 6915275..db858d5 100644
--- a/src/convert/convert.js
+++ b/src/convert/convert.js
@@ -16,10 +16,6 @@ function getTransition (unixTime, timeZone) {
   return { abbreviation, offset }
 }
 
-function attachEpoch (time, unixTime) {
-  Object.defineProperty(time, 'epoch', { value: unixTime })
-}
-
 function setTimeZone (time, timeZone, options) {
   if (time instanceof Date) {
     const { useUTC } = options || {}
@@ -39,7 +35,6 @@ function setTimeZone (time, timeZone, options) {
   const unixTime = getUnixTimeFromUTC(time)
   const { abbreviation, offset } = getTransition(unixTime, timeZone)
   time.zone = { abbreviation, offset }
-  attachEpoch(time, unixTime)
   return time
 }
 
@@ -52,7 +47,7 @@ function getZonedTime (date, timeZone) {
   }
   const time = getUTCTime(date)
   time.zone = { abbreviation, offset }
-  attachEpoch(time, unixTime)
+  Object.defineProperty(time, 'epoch', { value: unixTime })
   return time
 }
 
diff --git a/test/setTimeZone.test.js b/test/setTimeZone.test.js
index 123964a..4323347 100644
--- a/test/setTimeZone.test.js
+++ b/test/setTimeZone.test.js
@@ -5,7 +5,7 @@ const { findTimeZone, setTimeZone } = require('../dist/index')
 let berlin
 
 function checkTime (time, checkSeconds) {
-  const { year, month, day, hours, minutes, seconds, milliseconds, zone, epoch } = time
+  const { year, month, day, hours, minutes, seconds, milliseconds, zone } = time
   expect(year).toEqual(2018)
   expect(month).toEqual(1)
   expect(day).toEqual(2)
@@ -14,11 +14,9 @@ function checkTime (time, checkSeconds) {
   if (checkSeconds) {
     expect(seconds).toEqual(40)
     expect(milliseconds).toEqual(50)
-    expect(epoch).toEqual(1514889040050)
   } else {
     expect(seconds).toEqual(0)
     expect(milliseconds).toEqual(0)
-    expect(epoch).toEqual(1514889000000)
   }
   expect(typeof zone === 'object').toBeTruthy()
   expect(zone.abbreviation).toEqual('CET')