diff --git a/.changeset/silent-years-tickle.md b/.changeset/silent-years-tickle.md
new file mode 100644
index 0000000000..87c73705cc
--- /dev/null
+++ b/.changeset/silent-years-tickle.md
@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-circleci': patch
+---
+
+Swapped over to using Luxon as opposed to DayJS in the CircleCI plugin as part of the single Date library improvements.
diff --git a/plugins/circleci/package.json b/plugins/circleci/package.json
index 271250b149..bdc2946177 100644
--- a/plugins/circleci/package.json
+++ b/plugins/circleci/package.json
@@ -41,8 +41,9 @@
     "@material-ui/icons": "^4.9.1",
     "@material-ui/lab": "4.0.0-alpha.57",
     "circleci-api": "^4.0.0",
-    "dayjs": "^1.9.4",
+    "humanize-duration": "^3.27.0",
     "lodash": "^4.17.15",
+    "luxon": "^2.0.2",
     "react": "^16.13.1",
     "react-dom": "^16.13.1",
     "react-lazylog": "^4.5.2",
@@ -58,6 +59,7 @@
     "@testing-library/jest-dom": "^5.10.1",
     "@testing-library/react": "^11.2.5",
     "@testing-library/user-event": "^13.1.8",
+    "@types/humanize-duration": "^3.25.1",
     "@types/jest": "^26.0.7",
     "@types/node": "^14.14.32",
     "@types/react-lazylog": "^4.5.0",
diff --git a/plugins/circleci/src/util/time.ts b/plugins/circleci/src/util/time.ts
index cdaf8efb37..6572c5d18a 100644
--- a/plugins/circleci/src/util/time.ts
+++ b/plugins/circleci/src/util/time.ts
@@ -13,25 +13,31 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+import { DateTime, Interval } from 'luxon';
+import humanizeDuration from 'humanize-duration';
 
-import dayjs from 'dayjs';
-import durationPlugin from 'dayjs/plugin/duration';
-import relativeTimePlugin from 'dayjs/plugin/relativeTime';
-
-dayjs.extend(durationPlugin);
-dayjs.extend(relativeTimePlugin);
-
-type DateTimeObject = Date | string | number | undefined;
-
-export function relativeTimeTo(time: DateTimeObject, withoutSuffix = false) {
-  return dayjs().to(dayjs(time), withoutSuffix);
+export function relativeTimeTo(dateTimeISOString?: string) {
+  return dateTimeISOString
+    ? DateTime.fromISO(dateTimeISOString).toRelative()
+    : '';
 }
 
 export function durationHumanized(
-  startTime: DateTimeObject,
-  endTime: DateTimeObject,
-) {
-  return dayjs
-    .duration(dayjs(startTime).diff(dayjs(endTime || new Date())))
-    .humanize();
+  startDateTimeISOString?: string,
+  endDateTimeISOString?: string,
+): string {
+  if (!startDateTimeISOString || !endDateTimeISOString) {
+    return '';
+  }
+
+  const startDateTime = DateTime.fromISO(startDateTimeISOString);
+  const endDateTime = DateTime.fromISO(endDateTimeISOString);
+  const duration = Interval.fromDateTimes(
+    startDateTime,
+    endDateTime,
+  ).toDuration();
+
+  return humanizeDuration(duration.as('milliseconds'), {
+    largest: 1,
+  });
 }
diff --git a/yarn.lock b/yarn.lock
index 0e8cb79b53..82aa7a3da0 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -6709,6 +6709,11 @@
   resolved "https://registry.npmjs.org/@types/humanize-duration/-/humanize-duration-3.18.1.tgz#10090d596053703e7de0ac43a37b96cd9fc78309"
   integrity sha512-MUgbY3CF7hg/a/jogixmAufLjJBQT7WEf8Q+kYJkOc47ytngg1IuZobCngdTjAgY83JWEogippge5O5fplaQlw==
 
+"@types/humanize-duration@^3.25.1":
+  version "3.25.1"
+  resolved "https://registry.npmjs.org/@types/humanize-duration/-/humanize-duration-3.25.1.tgz#b6140d5fc00ff3917b3f521784abef4bc0387ccc"
+  integrity sha512-WZU/4bb+lvzyDmZzjJtp++9mfKy6B3lH6gGISgkcz6SU8hMILKRM0vi08TxIsb0dQB4Gzo68MWLmctu6xqUi9g==
+
 "@types/inquirer@^7.3.1":
   version "7.3.1"
   resolved "https://registry.npmjs.org/@types/inquirer/-/inquirer-7.3.1.tgz#1f231224e7df11ccfaf4cf9acbcc3b935fea292d"
@@ -11856,7 +11861,7 @@ dateformat@^3.0.0, dateformat@^3.0.3:
   resolved "https://registry.npmjs.org/dateformat/-/dateformat-3.0.3.tgz#a6e37499a4d9a9cf85ef5872044d62901c9889ae"
   integrity sha512-jyCETtSl3VMZMWeRo7iY1FL19ges1t55hMo5yaam4Jrsm5EPL89UQkoQRyiI+Yf4k8r2ZpdngkV8hr1lIdjb3Q==
 
-dayjs@^1.10.4, dayjs@^1.9.4:
+dayjs@^1.10.4:
   version "1.10.4"
   resolved "https://registry.npmjs.org/dayjs/-/dayjs-1.10.4.tgz#8e544a9b8683f61783f570980a8a80eaf54ab1e2"
   integrity sha512-RI/Hh4kqRc1UKLOAf/T5zdMMX5DQIlDxwUe3wSyMMnEbGunnpENCdbUgM+dW7kXidZqCttBrmw7BhN4TMddkCw==
@@ -15567,7 +15572,7 @@ human-signals@^2.1.0:
   resolved "https://registry.npmjs.org/human-signals/-/human-signals-2.1.0.tgz#dc91fcba42e4d06e4abaed33b3e7a3c02f514ea0"
   integrity sha512-B4FFZ6q/T2jhhksgkbEW3HBvWIfDW85snkQgawt07S7J5QXTk6BkNV+0yAeZrM5QpMAdYlocGoljn0sJ/WQkFw==
 
-humanize-duration@^3.25.1, humanize-duration@^3.26.0:
+humanize-duration@^3.25.1, humanize-duration@^3.26.0, humanize-duration@^3.27.0:
   version "3.27.0"
   resolved "https://registry.npmjs.org/humanize-duration/-/humanize-duration-3.27.0.tgz#3f781b7cf8022ad587f76b9839b60bc2b29636b2"
   integrity sha512-qLo/08cNc3Tb0uD7jK0jAcU5cnqCM0n568918E7R2XhMr/+7F37p4EY062W/stg7tmzvknNn9b/1+UhVRzsYrQ==