This is the best period to perform Al I’tikaf. This is in accordance with the hadith reported by ‘Aishah, who said: “The Prophet ﷺ used to seclude himself for worship in the last ten days of Ramadan until Allah Almighty took his soul.” [ Source: Bukhari.]
Anyone who intended to perform
Al I’tikaf would observe Salatus-Subhi on the 21st of the month in the mosque where he intended to perform Al I’tikaf and would subsequently enter into his seclusion. ‘Aisha (may Allah be pleased with her) reported: “The Prophet used to perform Al I’tikaf every year in the month of Ramadan; when he prayed Salatus-Subhi, he would enter the place of his Al I’tikaf.” [ Source: Bukhari.]
Al I’tikaf ends with the sunset of the last day of Ramadan. However, it is recommended to delay leaving the mosque until the early morning of ‘Eid day, because this is what was recorded as being practiced by many of our pious predecessors.
source:
islamkingdom