DateTimeController: make possible functions const

MonthShortToString and DayOfWeekShortToString don't change the
underlying object. Those are just getters and can be declared `const`.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/components/datetime/DateTimeController.cpp b/src/components/datetime/DateTimeController.cpp
index e0d12431..3bfbdc7e 100644
--- a/src/components/datetime/DateTimeController.cpp
+++ b/src/components/datetime/DateTimeController.cpp
@@ -108,11 +108,11 @@ void DateTime::UpdateTime(uint32_t systickCounter) {
   }
 }
 
-const char* DateTime::MonthShortToString() {
+const char* DateTime::MonthShortToString() const {
   return MonthsString[static_cast<uint8_t>(month)];
 }
 
-const char* DateTime::DayOfWeekShortToString() {
+const char* DateTime::DayOfWeekShortToString() const {
   return DaysStringShort[static_cast<uint8_t>(dayOfWeek)];
 }