diff --git a/README.md b/README.md
index 910329a..0397fc7 100644
--- a/README.md
+++ b/README.md
@@ -139,7 +139,7 @@ String formatting of date is hard.
 - [UTC is Enough for everyone, right?](https://zachholman.com/talk/utc-is-enough-for-everyone-right) - There are edge cases about dates and time (specifically UTC) that you probably haven't thought of.
 - [Storing UTC is not a silver bullet](https://codeblog.jonskeet.uk/2019/03/27/storing-utc-is-not-a-silver-bullet/) - "Just store dates in UTC" is not always the right approach..
 - [Falsehoods about Unix Time](https://alexwlchan.net/2019/05/falsehoods-programmers-believe-about-unix-time/) - Mind the leap second!
-
+- [Why is subtracting these two times (in 1927) giving a strange result?](https://stackoverflow.com/a/6841479/57311) - Infamous StackOverflow answer about both complicated historical timezones, and how historical dates can be re-interpreted by newer versions of software. 
 
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