1- It is recommended to fast three days each month, and it is best to fast al-ayyam al-beed, which are the 13th, 14th and 15th of the month. 2- There is nothing wrong with you fasting three days in Sha’ban, even if some of those happen to be in the latter half of the month.

The Hadiths indicate that it is permissible for the one who is observing a voluntary fast to break it especially if he is invited to eat by a Muslim.

You should fast and break your fast with the people of the country where you reside, even if it differs from your country of origin. Similarly, on the Day of `Arafah, you should follow the local practice of your place of residence.

Fasting on Mondays and Thursdays is better than fasting on three days of each month. If a person fasts on Mondays and Thursdays each week, that means that he is fasting eight days each month, so he will have done both. With regard to fasting on three days of each month, it is permissible to fast at the beginning of the month, in the middle or at the end, on consecutive days or separately. But it is better if it is done on the three white days, which are the thirteenth, fourteenth and fifteenth.