diff --git a/src/components/Calendar/day.js b/src/components/Calendar/day.js
index 50e730250..27d01ccd9 100644
--- a/src/components/Calendar/day.js
+++ b/src/components/Calendar/day.js
@@ -83,6 +83,7 @@ function DayComponent(props) {
                 <StyledDayButton
                     ref={buttonRef}
                     tabIndex={tabIndex}
+                    type="button"
                     onClick={() => onChange(date)}
                     onMouseEnter={() => privateOnHover(date)}
                     isSelected={isSelected}