diff --git a/.github/workflows/nodejs.yml b/.github/workflows/nodejs.yml
index 26893035..7cf0f750 100644
--- a/.github/workflows/nodejs.yml
+++ b/.github/workflows/nodejs.yml
@@ -17,5 +17,6 @@ jobs:
       - run: LANG=en_CA TZ=America/Vancouver yarn test
       - run: LANG=en_US TZ=America/Los_Angeles yarn test
       - run: LANG=sw_KE TZ=Africa/Nairobi yarn test
+      - run: LANG=en_KI TZ=Pacific/Kiritimati yarn test
       - run: LANG=jp_JP TZ=Asia/Tokyo yarn test-ci
       - run: nyc report --reporter=json && codecov -t ${{ secrets.CODECOV_REPO_TOKEN }} -f coverage/*.json
diff --git a/src/dateutil.ts b/src/dateutil.ts
index 66b43a61..b2cd176a 100644
--- a/src/dateutil.ts
+++ b/src/dateutil.ts
@@ -86,10 +86,12 @@ export const tzOffset = function (date: Date) {
 export const daysBetween = function (date1: Date, date2: Date) {
   // The number of milliseconds in one day
   // Convert both dates to milliseconds
-  const date1ms = date1.getTime() - tzOffset(date1)
-  const date2ms = date2.getTime() - tzOffset(date2)
+  const date1ms = date1.getTime()
+  const date2ms = date2.getTime()
+
   // Calculate the difference in milliseconds
   const differencems = date1ms - date2ms
+
   // Convert back to days and return
   return Math.round(differencems / ONE_DAY)
 }