diff --git a/frontend/admin/js/views/academic-calendar.js b/frontend/admin/js/views/academic-calendar.js
index c0b9ebd..c3df8be 100644
--- a/frontend/admin/js/views/academic-calendar.js
+++ b/frontend/admin/js/views/academic-calendar.js
@@ -870,7 +870,7 @@ export async function initAcademicCalendar() {
             : automaticTimeScopeLabel(day.dataset.date).replace('По правилу даты ', '');
         return `
             <div class="calendar-day-tooltip-head">
-                <span class="calendar-day-tooltip-code" style="--activity-color:${escapeHtml(color)}">${escapeHtml(code)}</span>
+                <span class="calendar-day-tooltip-code" style="--activity-color:${escapeHtml(color)}"><span>${escapeHtml(code)}</span></span>
                 <div>
                     <strong>${escapeHtml(formatLongDate(day.dataset.date))}</strong>
                     <span>${escapeHtml(shortDayLabel(day.dataset.day))}, ${escapeHtml(day.dataset.week)} неделя</span>