months property
Might be better from intl? package. Do it Map.
Implementation
Map<String, String> months = {
'January': '_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ',
'February': '_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ',
'March': '_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ',
'April': '_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ',
'May': '_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ',
'June': '_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ',
'July': '_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ',
'August': '_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ',
'September': '_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ',
'October': '_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ',
'November': '_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ',
'December': '_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ',
};