diff --git a/package-lock.json b/package-lock.json
index f36f4b365..368debec3 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -5352,6 +5352,12 @@
         }
       }
     },
+    "moment": {
+      "version": "2.22.0",
+      "resolved": "http://registry.npm.taobao.org/moment/download/moment-2.22.0.tgz",
+      "integrity": "sha1-eSGt4BAX3UUYbn/uX0JPC4ZjpzA=",
+      "dev": true
+    },
     "ms": {
       "version": "2.0.0",
       "resolved": "http://registry.npm.taobao.org/ms/download/ms-2.0.0.tgz",
diff --git a/package.json b/package.json
index e5cf70d62..4d15ec883 100644
--- a/package.json
+++ b/package.json
@@ -27,6 +27,7 @@
     "eslint-config-airbnb-base": "^12.1.0",
     "eslint-plugin-import": "^2.10.0",
     "jest": "^22.4.3",
+    "moment": "^2.22.0",
     "pre-commit": "^1.2.2"
   }
 }
diff --git a/src/index.js b/src/index.js
index d36a29d70..3fab13494 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,13 +1,32 @@
-class Moment {
-  constructor(config = new Date().getTime()) {
-    this.date = new Date(config)
+class Dayjs {
+  constructor(config) {
+    this.utc = false
+    const args = this.parseConfig(config)
+    this.date = new Date(args)
+  }
+
+  parseConfig(config) {
+    if (!config) return new Date()
+    if (/^(\d){8}$/.test(config)) {
+      this.utc = true
+      const y = config.substr(0, 4)
+      const m = config.substr(4, 2)
+      const d = config.substr(6, 2)
+      return `${y}-${m}-${d}`
+    }
+    return false
+  }
+
+  unix() {
+    const zonePad = this.utc ? this.date.getTimezoneOffset() * 60 * 1000 : 0
+    return Math.floor((this.date.getTime() + zonePad) / 1000)
   }
 
   toString() {
-    return this.date.toString()
+    return this.date.toUTCString()
   }
 }
 
 export default config => (
-  new Moment(config)
+  new Dayjs(config)
 )
diff --git a/test/index.test.js b/test/index.test.js
deleted file mode 100644
index 1bb1344b3..000000000
--- a/test/index.test.js
+++ /dev/null
@@ -1,5 +0,0 @@
-import moment from '../src'
-
-test('toString', () => {
-  expect(moment().toString()).toBe((new Date()).toString());
-});
\ No newline at end of file
diff --git a/test/parse.test.js b/test/parse.test.js
new file mode 100644
index 000000000..e503ef1b6
--- /dev/null
+++ b/test/parse.test.js
@@ -0,0 +1,10 @@
+import moment from 'moment'
+import dayjs from '../src'
+
+test('Now', () => {
+  expect(dayjs().unix()).toBe(moment().unix());
+});
+
+test('String 20130208', () => {
+  expect(dayjs('20130208').unix()).toBe(moment('20130208').unix());
+});
\ No newline at end of file