private void SetDateText(DateTime selectedDate)
        {
            TextMeshProUGUI dateText = m_dateButton.GetComponentInChildren <TextMeshProUGUI>();

            string dayOfWeek = selectedDate.DayOfWeek.ToString();
            string month     = CalendarController.GetMonth(selectedDate.Month);

            // tue,jan.28,2021 - example
            dateText.text = dayOfWeek.Remove(3, dayOfWeek.Length - 3).ToLower() + ", " +
                            month.Remove(3, month.Length - 3).ToLower() + ". " +
                            selectedDate.Day + ", " + selectedDate.Year;
        }