About this episode
Pictures Today's daf is dedicated by Daniel and Hazzan Sarah Alexander in honor of their son, Aharon Shmuel ben Daniel v'heChazzan Sarah, who started daf yomi at the beginning of this cycle and today has reached the age of mitzvot. Mazel tov! The gemara discusses when putting a door in its place is considered building on Shabbat. In what situations can one use a key to unlock a door on Shabbat without it being considered that one moved the key from one domain to another?