Paradise. As for the worldly benefits, they include saving of time and money during the day (the time and money spent on eating and drinking), a healthy digestive system, protection from many illnesses and, above all, the pleasure of Allah عَزَّوَجَلَّ. (Faizan-e-Ramadan, pp. 1333)

اَلْـحَمْـدُ لـِلّٰـه عَزَّوَجَلَّ! 6 Nafl fasts are observed in the month of Shawwal-ul-Mukarram. Great virtues of these fasts have been mentioned in blessed Ahadees. For persuasion, let’s listen to 3 blessed sayings of Beloved Mustafa صَلَّى اللهُ تَعَالٰى عَلَيْهِ وَاٰلِهٖ وَسَلَّم, containing the excellence of six fasts:

1.         The person who observes the fasts of Ramadan then 6 days in Shawwal, so he gets out of sins as he is born from the womb of mother today.

(Majma’-uz-Zawaid, vol. 3, pp. 425, Hadees 5102)

2.         Whoever observes fasts in Ramadan and then observes six fasts in Shawwal, it is as if he has observed fasts for his entire life.

(Sahih Muslim, pp. 592, Hadees 1164)

3.         The one fasting six days after Eid-ul-Fitr (in Shawwal) has fasted the entire year because whoever brings one good deed will get ten.

(Sunan Ibn Majah, vol. 2, pp. 333, Hadees 1715)

Khaleel-e-Millat, ‘Allamah Maulana Mufti Muhammad Khaleel Khan Qaadiri Barakati رَحْمَةُ الـلّٰـهِ تَـعَالٰی عَـلَيْه has stated: Though there is no harm if somebody observes these fasts consecutively after Eid-ul-Fitr, it is better to observe them separately, i.e. one after Eid-ul-Fitr, then two in every week. If it takes the whole month to have these six fasts, it seems even more appropriate.

(Sunni Bahashti Zaywar, pp. 347)

In other words, one can observe six fasts whenever he wants in the whole month of Shawwal except the day of Eid-ul-Fitr.