🔧 Refactor code for better readability

🚀 Implement custom header for date picker
✨ Add two-month view functionality
📅 Update custom day component
🔄 Improve date handling

src/components/DatePickerCustomDay.tsx

@@ -0,0 +1,12 @@
+import React, { FC } from "react";
+
+interface Props {
+  dayOfMonth: number;
+  date?: Date | undefined;
+}
+
+const DatePickerCustomDay: FC<Props> = ({ dayOfMonth, date }) => {
+  return <span className="react-datepicker__day_span">{dayOfMonth}</span>;
+};
+
+export default DatePickerCustomDay;