--- a/toolkit/themes/shared/datetimeinputpickers.css
+++ b/toolkit/themes/shared/datetimeinputpickers.css
@@ -256,16 +256,20 @@ button.month-year.active::after {
   background: var(--disabled-fill-color);
 }
 
 .days-view > .out-of-range.weekend,
 .days-view > .off-step.weekend {
   color: var(--weekend-disabled-font-color);
 }
 
+.days-view > .today {
+  font-weight: bold;
+}
+
 .days-view > .out-of-range::before,
 .days-view > .off-step::before {
   display: none;
 }
 
 .days-view > div:hover::before,
 .days-view > .select::before,
 .days-view > .today::before {
@@ -348,16 +352,21 @@ button.month-year.active::after {
 
 .spinner-container > .spinner > div:hover::before,
 .calendar-container .days-view > div:hover::before {
   background: var(--fill-color);
   border: var(--border);
   content: "";
 }
 
+.calendar-container .days-view > div.today::before {
+  background: var(--today-fill-color);
+  content: "";
+}
+
 .spinner-container > .spinner:not(.scrolling) > div.selection,
 .calendar-container .days-view > div.selection {
   color: var(--selected-font-color);
 }
 
 .spinner-container > .spinner > div.selection::before,
 .calendar-container .days-view > div.selection::before {
   background: var(--selected-fill-color);