diff --git a/tools/README.md b/tools/README.md
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--- /dev/null
+++ b/tools/README.md
@@ -0,0 +1,4 @@
+This directory contains small helper scripts and tools that are peripheral
+or tangent to the main entomologist tool.
+
+We make no guarantees about functionality or correctness.
diff --git a/tools/done-last-week b/tools/done-last-week
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+++ b/tools/done-last-week
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+#!/bin/bash
+
+START=$(date --iso-8601=seconds --date='last monday - 1 week')
+END=$(date --iso-8601=seconds --date='last monday')
+
+#echo START=${START}
+#echo END=${END}
+
+ent list \
+    state=done \
+    done-time="${START}..${END}"
diff --git a/tools/set-done-time b/tools/set-done-time
new file mode 100755
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+++ b/tools/set-done-time
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+#!/bin/bash
+#
+# This script finds all issues with state=Done which do not have a
+# `done_time`.
+#
+# It sets each issue's `done_time` to the most recent time that the
+# `state` was updated from the git log.
+#
+
+set -e
+
+for ISSUE_ID in $(ent list state=done done-time=9999-01-01T00:00:00-06:00.. | grep '  ' | cut -f 1 -d ' '); do
+    echo ${ISSUE_ID}
+    UTIME=$(PAGER='' git log -n1 --pretty=format:%at%n entomologist-data -- ${ISSUE_ID}/state)
+    echo ${UTIME}
+    DATETIME=$(date --rfc-3339=seconds --date="@${UTIME}")
+    echo ${DATETIME}
+    ent done-time ${ISSUE_ID} "${DATETIME}"
+done