Question: We work at a shop that sells clothes. On the last ten days of Ramadaan we cannot observe I`tikaaf (seclusion for worship in a Masjid) during the day because of work conditions. Is it valid to observe I`tikaaf only at night and work during the day at the shop?
Answer: It is permissible to observe I`tikaaf even for an hour at a Masjid (mosque) where congregational Salaah (Prayer) is offered. It is valid to observe I`tikaaf without observing Sawm (Fast) during the time of I`tikaaf according to the most correct opinion maintained by scholars… read more here.