Merged in [16589] from rjsparks@nostrum.com:

    Show a calendar of upcoming meetings. Fixes ietf-tools#2719.
 - Legacy-Id: 16602
Note: SVN reference [16589] has been migrated to Git commit d3b70a4

Author: levkowetz

ietf/externals/static/fullcalendar/core/main.css

@@ -0,0 +1,69 @@
+/*!
+FullCalendar Day Grid Plugin v4.2.0
+Docs & License: https://fullcalendar.io/
+(c) 2019 Adam Shaw
+*/
+/* DayGridView
+--------------------------------------------------------------------------------------------------*/
+/* day row structure */
+.fc-dayGridWeek-view .fc-content-skeleton,
+.fc-dayGridDay-view .fc-content-skeleton {
+  /* there may be week numbers in these views, so no padding-top */
+  padding-bottom: 1em;
+  /* ensure a space at bottom of cell for user selecting/clicking */ }
+
+.fc-dayGrid-view .fc-body .fc-row {
+  min-height: 4em;
+  /* ensure that all rows are at least this tall */ }
+
+/* a "rigid" row will take up a constant amount of height because content-skeleton is absolute */
+.fc-row.fc-rigid {
+  overflow: hidden; }
+
+.fc-row.fc-rigid .fc-content-skeleton {
+  position: absolute;
+  top: 0;
+  left: 0;
+  right: 0; }
+
+/* week and day number styling */
+.fc-day-top.fc-other-month {
+  opacity: 0.3; }
+
+.fc-dayGrid-view .fc-week-number,
+.fc-dayGrid-view .fc-day-number {
+  padding: 2px; }
+
+.fc-dayGrid-view th.fc-week-number,
+.fc-dayGrid-view th.fc-day-number {
+  padding: 0 2px;
+  /* column headers can't have as much v space */ }
+
+.fc-ltr .fc-dayGrid-view .fc-day-top .fc-day-number {
+  float: right; }
+
+.fc-rtl .fc-dayGrid-view .fc-day-top .fc-day-number {
+  float: left; }
+
+.fc-ltr .fc-dayGrid-view .fc-day-top .fc-week-number {
+  float: left;
+  border-radius: 0 0 3px 0; }
+
+.fc-rtl .fc-dayGrid-view .fc-day-top .fc-week-number {
+  float: right;
+  border-radius: 0 0 0 3px; }
+
+.fc-dayGrid-view .fc-day-top .fc-week-number {
+  min-width: 1.5em;
+  text-align: center;
+  background-color: #f2f2f2;
+  color: #808080; }
+
+/* when week/day number have own column */
+.fc-dayGrid-view td.fc-week-number {
+  text-align: center; }
+
+.fc-dayGrid-view td.fc-week-number > * {
+  /* work around the way we do column resizing and ensure a minimum width */
+  display: inline-block;
+  min-width: 1.25em; }