Does one have to fast six days of Shawwaal every year?

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Check below answers in case you are looking for other related questions:
She has to offer expiation for killing but she cannot free a slave or fast, so can she feed a number of poor persons?
Combining the fast of Dawood and fasting on Mondays and Thursdays

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Related Answers:
He only fasts Ramadaan and does not observe any naafil fasts
The reason why it is forbidden to single out Friday for fasting
If a person starts to observe a naafil fast then breaks his fast, does he have to make it up?
She has to offer expiation for killing but she cannot free a slave or fast, so can she feed a number of poor persons?
Combining the fast of Dawood and fasting on Mondays and Thursdays

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