diff --git a/_includes/common/strftime_format.md b/_includes/common/strftime_format.md
new file mode 100644
index 000000000..1cda542a7
--- /dev/null
+++ b/_includes/common/strftime_format.md
@@ -0,0 +1,60 @@
+## {{ include.title }}
+{: .-three-column}
+
+### Presets
+
+#### Date
+
+| Example         | Output                 |
+| ---             | ---                    |
+| `%m/%d/%Y`      | `06/05/2013`           |
+| `%A, %B %e, %Y` | `Sunday, June 5, 2013` |
+| `%b %e %a`      | `Jun 5 Sun`            |
+{: .-shortcuts}
+
+#### Time
+
+| Example         | Output                 |
+| ---             | ---                    |
+| `%H:%M`         | `23:05`                |
+| `%I:%M %p`      | `11:05 PM`             |
+{: .-shortcuts}
+
+Used by Ruby, UNIX `date`, and many more.
+
+### Date
+
+| Symbol | Example                  | Area        |
+| ---    | ---                      | ---         |
+| `%a`   | `Sun`                    | **Weekday** |
+| `%A`   | `Sunday`                 |             |
+| `%w`   | `0`..`6` _(Sunday is 0)_ |             |
+| ---    | ---                      | ---         |
+| `%y`   | `13`                     | **Year**    |
+| `%Y`   | `2013`                   |             |
+| ---    | ---                      | ---         |
+| `%b`   | `Jan`                    | **Month**   |
+| `%B`   | `January`                |             |
+| `%m`   | `01`..`12`               |             |
+| ---    | ---                      | ---         |
+| `%d`   | `01`..`31`               | **Day**     |
+| `%e`   | `1`..`31`                |             |
+{: .-shortcuts}
+
+### Time
+
+| Symbol | Example      | Area                |
+| ---    | ---          | ---                 |
+| `%l`   | `1`          | Hour                |
+| `%H`   | `00`..`23`   | 24h Hour            |
+| `%I`   | `01`..`12`   | 12h Hour            |
+| --     | ---          | ---                 |
+| `%M`   | `00`..`59`   | Minute              |
+| `%S`   | `00`..`60`   | Second              |
+| ---    | ---          | ---                 |
+| `%p`   | `AM`         | AM or PM            |
+| `%Z`   | `+08`        | Time zone           |
+| ---    | ---          | ---                 |
+| `%j`   | `001`..`366` | Day of the year     |
+| `%%`   | `%`          | Literal % character |
+{: .-shortcuts}
diff --git a/datetime.md b/datetime.md
index 7cb704e80..075052fc6 100644
--- a/datetime.md
+++ b/datetime.md
@@ -6,71 +6,12 @@ updated: 2017-09-04
 tags: [Featurable]
 ---
 
-### Common time formats
+## Common time formats
 {: .-one-column}
 
-- [UNIX](#unix) - Used by Ruby, `date`, and more
-- [Moment.js](#moment-js) - Used by Moment.js, date-fns, and more
+- [UNIX strftime](./strftime) - Used by Ruby, `date`, and more
+- [Moment.js](./moment#formatting) - Used by Moment.js, date-fns, and more
 
-## UNIX
-{: .-three-column}
+{% include common/strftime_format.md title="strftime format" %}
 
-### Presets
-
-#### Date
-
-| Example         | Output                 |
-| ---             | ---                    |
-| `%m/%d/%Y`      | `06/05/2013`           |
-| `%A, %B %e, %Y` | `Sunday, June 5, 2013` |
-| `%b %e %a`      | `Jun 5 Sun`            |
-{: .-shortcuts}
-
-#### Time
-
-| Example         | Output                 |
-| ---             | ---                    |
-| `%H:%M`         | `23:05`                |
-| `%I:%M %p`      | `11:05 PM`             |
-{: .-shortcuts}
-
-Used by Ruby, UNIX `date`, and many more.
-
-### Date
-
-| Symbol | Example                  | Area        |
-| ---    | ---                      | ---         |
-| `%a`   | `Sun`                    | **Weekday** |
-| `%A`   | `Sunday`                 |             |
-| `%w`   | `0`..`6` _(Sunday is 0)_ |             |
-| ---    | ---                      | ---         |
-| `%y`   | `13`                     | **Year**    |
-| `%Y`   | `2013`                   |             |
-| ---    | ---                      | ---         |
-| `%b`   | `Jan`                    | **Month**   |
-| `%B`   | `January`                |             |
-| `%m`   | `01`..`12`               |             |
-| ---    | ---                      | ---         |
-| `%d`   | `01`..`31`               | **Day**     |
-| `%e`   | `1`..`31`                |             |
-{: .-shortcuts}
-
-### Time
-
-| Symbol | Example      | Area                |
-| ---    | ---          | ---                 |
-| `%l`   | `1`          | Hour                |
-| `%H`   | `00`..`23`   | 24h Hour            |
-| `%I`   | `01`..`12`   | 12h Hour            |
-| --     | ---          | ---                 |
-| `%M`   | `00`..`59`   | Minute              |
-| `%S`   | `00`..`60`   | Second              |
-| ---    | ---          | ---                 |
-| `%p`   | `AM`         | AM or PM            |
-| `%Z`   | `+08`        | Time zone           |
-| ---    | ---          | ---                 |
-| `%j`   | `001`..`366` | Day of the year     |
-| `%%`   | `%`          | Literal % character |
-{: .-shortcuts}
-
-{% include common/moment_format.md title="Moment.js" %}
+{% include common/moment_format.md title="Moment.js format" %}
diff --git a/strftime.md b/strftime.md
new file mode 100644
index 000000000..cc228a3a3
--- /dev/null
+++ b/strftime.md
@@ -0,0 +1,11 @@
+---
+title: strftime format
+layout: 2017/sheet
+weight: -5
+updated: 2017-09-04
+tags: [Featurable]
+intro: |
+  The strftime format is the standard date formatting for UNIX. It's used in C, Ruby, and more.
+---
+
+{% include common/strftime_format.md title="strftime" %}