I think I have it now

I have something close to what is displaying in Firefox and Chrome working in Edge.

diff --git a/css/front.css b/css/front.css
index edadde1..8c79115 100755 (executable)
--- a/css/front.css
+++ b/css/front.css
@@ -370,7 +370,7 @@ a.fc-time-grid-event.fc-v-event {
 #eventCalendar .fc-button .fc-icon.fc-icon-right-single-arrow:after {
     content: ">";
     font-weight: 700;
-    font-size: 200%;
+    font-size: 150%;
     top: -7%;
     left: 3%;
     display: block;
@@ -379,7 +379,7 @@ a.fc-time-grid-event.fc-v-event {
 #eventCalendar .fc-button .fc-icon.fc-icon-left-single-arrow:after {
     content: "<";
     font-weight: 700;
-    font-size: 200%;
+    font-size: 150%;
     top: -7%;
     left: 3%;
     display: block;