diff --git a/README.md b/README.md
index f16eaf6014961ed8fdbaf9f9d4347379cc2ad65a_UkVBRE1FLm1k..27ac3cb46c9d3b1e902788a01b81aec6ee8da13c_UkVBRE1FLm1k 100644
--- a/README.md
+++ b/README.md
@@ -221,3 +221,10 @@
 The `branch_bookmark_suffix` option is, like the `authors` option, intended for
 migrating legacy hg named branches.   Going forward, an hg repo that is to 
 be linked with a git repo should only use bookmarks for named branching.
+
+git.mindate
+-----------
+
+If set, branches where the latest commit's commit time is older than this will
+not be imported. Accepts any date formats that Mercurial does -- see
+`hg help dates` for more.