from datetime import date, timedelta
DIAS = [
'Segunda-feira',
'Terça-feira',
'Quarta-feira',
'Quinta-Feira',
'Sexta-feira',
'Sábado',
'Domingo'
]
inicio = date(year=2018, month=4, day=26)
ferias = timedelta(days=137)
final = inicio + ferias
print(DIAS[final.weekday()])
ZnJvbSBkYXRldGltZSBpbXBvcnQgZGF0ZSwgdGltZWRlbHRhCgpESUFTID0gWwogICAgJ1NlZ3VuZGEtZmVpcmEnLAogICAgJ1RlcsOnYS1mZWlyYScsCiAgICAnUXVhcnRhLWZlaXJhJywKICAgICdRdWludGEtRmVpcmEnLAogICAgJ1NleHRhLWZlaXJhJywKICAgICdTw6FiYWRvJywKICAgICdEb21pbmdvJwpdCgppbmljaW8gPSBkYXRlKHllYXI9MjAxOCwgbW9udGg9NCwgZGF5PTI2KQpmZXJpYXMgPSB0aW1lZGVsdGEoZGF5cz0xMzcpCmZpbmFsID0gaW5pY2lvICsgZmVyaWFzCgpwcmludChESUFTW2ZpbmFsLndlZWtkYXkoKV0p