diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 00000000..21a415dc
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,61 @@
+Thanks for submitting or fixing an icon! Here is a helpful guide to what you need to include.
+
+- [ ] New file
+- [ ] Edit Readme
+- [ ] Edit radius page
+- [ ] Add reference image
+- [ ] Edit reference page
+- [ ] (optional) Android Image
+
+## New File
+
+Filename should be `nameofservice.svg` - all in lower-case.
+
+Place the file in `/images/svg/`
+
+At a minimum, your icon needs these components:
+
+```
+<svg
+xmlns="http://www.w3.org/2000/svg"
+aria-label="..." role="img"
+viewBox="0 0 512 512">
+<rect
+width="512" height="512"
+rx="15%"
+fill="#fff"/>
+...
+</svg>
+```
+
+Please keep the whitespace as-is. This makes viewing diffs easier.
+
+## Edit Readme
+
+Add a table cell to README.md - it must be in this format:
+
+```
+<td><img src="images/svg/nameofservice.svg" width="125" title="Name Of Service" /><br>229 Bytes</td>
+```
+
+## Edit Radius Page
+
+* Edit the file `radius.html`
+* Add the name of your service to `var items`
+* For example `, 'nameofservice', `
+
+## Reference Image
+
+* Find an *official* logo.
+* Add it to `/images/reference/`
+
+## Reference Page
+
+* Edit the file `/images/reference/index.md`
+* Add a link to the *official* style guide or brand guidelines.
+* For example `| <img src="/images/svg/nameofservice.svg" width="256" />	| <img src="/images/reference/nameofservice.jpg" width="256" />	| https://example.com/press |`
+
+## (Optional) Create Android Version
+
+* Use https://inloop.github.io/svg2android/ to create an Android-compatible XML file.
+* Add the file to `/images/android-vector-drawable/`
diff --git a/README.md b/README.md
index 71dba753..00817209 100644
--- a/README.md
+++ b/README.md
@@ -149,6 +149,8 @@ Say thanks!
 <tr>
 <td><img src="images/svg/buffer.svg" width="125" title="buffer" /><br>490 Bytes</td>
 <td><img src="images/svg/apple_music.svg" width="125" title="Apple Music" /><br>998 Bytes</td>
+<td><img src="images/svg/upwork.svg" width="125" title="UpWork" /><br>671 Bytes</td>
+<td><img src="images/svg/calendar.svg" width="125" title="Calendar" /><br>1019 Bytes</td>
 </tr>
 </table>
 
@@ -263,6 +265,6 @@ The majority of these vector logos are based on someone else's work.
 
 From [SVGporn](https://github.com/gilbarbara/logos/) - CC0
 
-IBM, Yammer, Android, Authy, ClourFlare, CodePen, DigitalOcean, Discord, AirBnB, WiFi, delicious, opensource, Patreon
+IBM, Yammer, Android, Authy, CloudFlare, CodePen, DigitalOcean, Discord, AirBnB, WiFi, delicious, opensource, Patreon
 
 Where possible, they retain their original licenses.  Some logos may be subject to copyright and trademark laws, but these files are small enough to memorise.
diff --git a/images/android-vector-drawable/upwork.xml b/images/android-vector-drawable/upwork.xml
new file mode 100644
index 00000000..cac688ad
--- /dev/null
+++ b/images/android-vector-drawable/upwork.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="512dp"
+    android:height="512dp"
+    android:viewportWidth="512"
+    android:viewportHeight="512">
+
+    <path
+        android:fillColor="#6fda44"
+        android:pathData="M 15 0 L 497 0 Q 512 0 512 15 L 512 497 Q 512 512 497 512 L 15 512 Q 0 512 0 497 L 0 15 Q 0 0 15 0 Z" />
+    <path
+        android:fillColor="#ffffff"
+        android:pathData="M357.2,296.9c-17,0-33-7.2-47.4-18.9l3.5-16.6l0.1-0.6c3.2-17.6,13.1-47.2,43.8-47.2c23,0,41.7,18.7,41.7,41.7S380.2,296.9,357.2,296.9L357.2,296.9z
+M357.2,171.4c-39.2,0-69.5,25.4-81.9,67.3c-18.8-28.3-33.1-62.2-41.4-90.8h-42.2v109.7c0,21.7-17.6,39.3-39.3,39.3s-39.3-17.6-39.3-39.3V147.8H71v109.7c0,44.9,36.5,81.8,81.4,81.8s81.4-36.9,81.4-81.8v-18.4c8.2,17.1,18.2,34.4,30.4,49.6l-25.8,121.4h43.1l18.7-88c16.4,10.5,35.2,17.1,56.8,17.1c46.2,0,83.8-37.8,83.8-84.1C440.9,209,403.4,171.4,357.2,171.4" />
+</vector>
\ No newline at end of file
diff --git a/images/svg/calendar.svg b/images/svg/calendar.svg
new file mode 100644
index 00000000..507c5f81
--- /dev/null
+++ b/images/svg/calendar.svg
@@ -0,0 +1,6 @@
+<svg onload="init()" xmlns="http://www.w3.org/2000/svg"
+aria-label="Calendar" role="img"
+viewBox="0 0 512 512"><script type="text/ecmascript"><![CDATA[function init(){d=document,L="en-GB",T=new Date,d.getElementById("d").textContent=T.getDate(),d.getElementById("w").textContent=T.toLocaleString(L,{weekday:"long"}),d.getElementById("m").textContent=T.toLocaleString(L,{month:"short"}).toUpperCase()}]]></script><rect
+width="512" height="512"
+rx="77"
+fill="#dee"/><path d="m77 0h358a77 77 0 0 1 77 77v103h-512v-103a77 77 0 0 1 77-77z" fill="#d34"/><g fill="#eab"><circle cx="470" cy="142" r="14"/><circle cx="470" cy="100" r="14"/><circle cx="427" cy="142" r="14"/><circle cx="427" cy="100" r="14"/><circle cx="384" cy="142" r="14"/><circle cx="384" cy="100" r="14"/></g><g fill="#677" font-family="monospace" text-anchor="middle"><text fill="#fff" font-size="140" x="140" y="164" id="m">FEB</text><text font-size="256" x="256" y="400" id="d">29</text><text font-size="64" x="256" y="480" id="w">Sunday</text></g></svg>
\ No newline at end of file
diff --git a/images/svg/upwork.svg b/images/svg/upwork.svg
new file mode 100644
index 00000000..e72b1d6e
--- /dev/null
+++ b/images/svg/upwork.svg
@@ -0,0 +1,7 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+aria-label="UpWork" role="img"
+viewBox="0 0 512 512"><rect
+width="512" height="512"
+rx="15%"
+fill="#6fda44"/><path fill="#ffffff" d="M357.2,296.9c-17,0-33-7.2-47.4-18.9l3.5-16.6l0.1-0.6c3.2-17.6,13.1-47.2,43.8-47.2c23,0,41.7,18.7,41.7,41.7S380.2,296.9,357.2,296.9L357.2,296.9z M357.2,171.4c-39.2,0-69.5,25.4-81.9,67.3c-18.8-28.3-33.1-62.2-41.4-90.8h-42.2v109.7c0,21.7-17.6,39.3-39.3,39.3s-39.3-17.6-39.3-39.3V147.8H71v109.7c0,44.9,36.5,81.8,81.4,81.8s81.4-36.9,81.4-81.8v-18.4c8.2,17.1,18.2,34.4,30.4,49.6l-25.8,121.4h43.1l18.7-88c16.4,10.5,35.2,17.1,56.8,17.1c46.2,0,83.8-37.8,83.8-84.1C440.9,209,403.4,171.4,357.2,171.4"/>
+</svg>
\ No newline at end of file