' This day is designed as a sign of gratefulness by the Muslims on the accomplishment of Ramzan and as an reward by Allah. Fasting for six days in the month of Shawwal has great virtue and is considered as an immense reward.

What are the benefits of fasting in Shawwal?

Fasting six days of Shawwal after the obligatory fast of Ramadan is Sunnah Mustahab, not wajib. The important benefits of fasting six days of Shawwal is that is makes up for any shortfall in a person's obligatory Ramadan fasts, because no one is free of shortcomings or sins that have a negative effect on his fasting.

Why do we fast six days in Shawwal?

Fasting during Shawwāl

The reasoning behind this tradition is that a good deed in Islam is rewarded 10 times, hence fasting 30 days during Ramadan and 6 days during Shawwāl is equivalent to fasting the whole year in fulfillment of the obligation.