adicn/statics/js/calendar/reduce-spacing.css

.DynarchCalendar, .DynarchCalendar table {
  font-size: 10px;
}
.DynarchCalendar-dayNames { padding: 0; }
.DynarchCalendar-body { padding: 0; }
.DynarchCalendar-animBody-back { top: 0; }
.DynarchCalendar-animBody-fwd { top: 0; }
.DynarchCalendar-animBody-now { top: 0; }
.DynarchCalendar-first-col { padding-left: 0; }
.DynarchCalendar-last-col { padding-right: 0; }
.DynarchCalendar-weekNumber {
  margin-right: 0;
  padding-right: 4px !important;
}
.DynarchCalendar-dayNames div, .DynarchCalendar-day, .DynarchCalendar-weekNumber {
  padding: 1px 2px;
}
.DynarchCalendar-menu-year { font-size: 12px; }

.DynarchCalendar-hover-date {
  padding: 0px 1px;
}
.DynarchCalendar-day-selected {
  padding: 0px 1px;
}
.DynarchCalendar-menu table td div {
  padding: 2px 4px;
}
.DynarchCalendar-menu table td div.DynarchCalendar-hover-navBtn {
  padding: 1px 3px;
}