diff --git a/README.md b/README.md
index 03812bf..757343a 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ pairing with smart people at Hashrocket.
 
 For a steady stream of TILs, [sign up for my newsletter](https://crafty-builder-6996.ck.page/e169c61186).
 
-_1389 TILs and counting..._
+_1390 TILs and counting..._
 
 ---
 
@@ -1623,6 +1623,7 @@ _1389 TILs and counting..._
 - [Open Slack's Keyboard Shortcuts Reference Panel](workflow/open-slacks-keyboard-shortcuts-reference-panel.md)
 - [Prune The Excess From node_modules](workflow/prune-the-excess-from-node-modules.md)
 - [Rotate An Image To Be Oriented Upright](workflow/rotate-an-image-to-be-oriented-upright.md)
+- [See Overlaps For A Set Of Time Zones](workflow/see-overlaps-for-a-set-of-time-zones.md)
 - [Set Recurring Reminders In Slack](workflow/set-recurring-reminders-in-slack.md)
 - [Toggle Between Stories In Storybook](workflow/toggle-between-stories-in-storybook.md)
 - [Update asdf Plugins With Latest Package Versions](workflow/update-asdf-plugins-with-latest-package-versions.md)
diff --git a/workflow/see-overlaps-for-a-set-of-time-zones.md b/workflow/see-overlaps-for-a-set-of-time-zones.md
new file mode 100644
index 0000000..8cf148c
--- /dev/null
+++ b/workflow/see-overlaps-for-a-set-of-time-zones.md
@@ -0,0 +1,25 @@
+# See Overlaps For A Set Of Time Zones
+
+The `tz` command (`brew install tz`) will display by default your local time
+and UTC for comparison. By including the `TZ_LIST` env var with a semi-colon
+separated list of time zones, you can display several time zones to see how
+they compare. The results are even color coded for working, flex, and
+non-working hours.
+
+```bash
+❯ TZ_LIST="US/Pacific;US/Central;Europe/Paris" tz
+
+  What time is it?
+
+  🕕 (CST) Local 6:59PM, Tue 05
+   0   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20  21  22  23
+
+  🕓 (PST) US/Pacific 4:59PM, Tue 05
+  22  23   0   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20  21
+
+  🕕 (CST) US/Central 6:59PM, Tue 05
+   0   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20  21  22  23
+
+  🕐 (CET) Europe/Paris 1:59AM, Wed 06
+   7   8   9  10  11  12  13  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4   5   6
+```