diff --git a/README.md b/README.md
index 6eea2fc..2c49eda 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).
 
-_1563 TILs and counting..._
+_1564 TILs and counting..._
 
 See some of the other learning resources I work on:
 - [Ruby Operator Lookup](https://www.visualmode.dev/ruby-operators)
@@ -334,6 +334,7 @@ See some of the other learning resources I work on:
 - [Interactively Unstage Changes](git/interactively-unstage-changes.md)
 - [Keep File Locally With `git rm`](git/keep-file-locally-with-git-rm.md)
 - [Last Commit A File Appeared In](git/last-commit-a-file-appeared-in.md)
+- [List All Files Added During Span Of Time](git/list-all-files-added-during-span-of-time.md)
 - [List All Files Changed Between Two Branches](git/list-all-files-changed-between-two-branches.md)
 - [List Branches That Contain A Commit](git/list-branches-that-contain-a-commit.md)
 - [List Commits On A Branch](git/list-commits-on-a-branch.md)
diff --git a/git/list-all-files-added-during-span-of-time.md b/git/list-all-files-added-during-span-of-time.md
new file mode 100644
index 0000000..ec5d171
--- /dev/null
+++ b/git/list-all-files-added-during-span-of-time.md
@@ -0,0 +1,49 @@
+# List All Files Added During Span Of Time
+
+I wanted to get an idea of all the TIL posts I wrote during 2024. Every TIL I
+write is under version control in a [git repo on
+github](https://github.com/jbranchaud/til). That means git has all the info I
+need to figure that out.
+
+The `git diff` command is a good way at this problem. With the
+`--diff-filter=A` flag I can restrict the results to just files that were
+_Added_. And with `--name-only` I can cut all the other diff details out and
+get just filenames.
+
+But filenames added to which commits? We need to specify a ref range. There is
+a ton of flexibility in how you define a ref, including [a date specification
+suffix](https://git-scm.com/docs/gitrevisions#Documentation/gitrevisions.txt-emltrefnamegtltdategtemegemmasteryesterdayememHEAD5minutesagoem)
+that points to the value of the ref at an earlier point in time.
+
+So, how about from the beginning of 2024 to the beginning of 2025:
+
+```
+HEAD@{2024-01-01}..HEAD@{2025-01-01}
+```
+
+Putting that all together, we this command and potentially a big list of files.
+
+```bash
+$ git diff --diff-filter=A --name-only HEAD@{2024-01-01}..HEAD@{2025-01-01}
+```
+
+I wanted to restrict the results to just markdown files, so I added a filename
+pattern.
+
+```bash
+$ git diff --diff-filter=A --name-only HEAD@{2024-01-01}..HEAD@{2025-01-01} -- "*.md"
+```
+
+I could even go a step further to see only the files added to a specific
+directory.
+
+```bash
+$ git diff --diff-filter=A --name-only HEAD@{2024-01-01}..HEAD@{2025-01-01} -- "postgres/*.md"
+```
+
+As a final bonus, I can spit out the github URLs for all those files with a bit of `awk`.
+
+```bash
+$ git diff --diff-filter=A --name-only HEAD@{2024-01-01}..HEAD@{2025-01-01} -- "postgres/*.md" |
+awk '{print "https://github.com/jbranchaud/til/blob/master/" $0}'
+```