When Is the Best Time to Wear Rabenu Tam Tefillin—And Can One Switch Between Them During the Hazara? Many Sepharadim follow the custom of wearing both Rashi and Rabenu Tam Tefillin each morning. While Rashi's Tefillin fulfill the primary obligation, Rabenu Tam's are worn as an added measure of piety—especially among those who follow the teachings of the Mekubalim . This practice raises several practical questions: When should one switch to Rabenu Tam? Can it be done during the Hazara or Kaddish? And what is the proper way to time and perform this change? What's the Ideal Time to Wear Rabenu Tam Tefillin? The most preferred time to switch to Rabenu Tam is after completing Shaharit entirely , including: Aleinu Any post-prayer supplications Removal of the Rashi Tefillin respectfully The Mekubalim —especially the Arizal —emphasized that Rabenu Tam should be worn after the formal structure of Shaharit , not in the middle. Can One Switch Tefillin During Hazara or Kaddish? Some mistakenly remove Rashi and put on Rabenu Tam during the Hazara (repetition of the Amidah) or Kaddish . This is not recommended : The Hazara is part of the structured Tefilla. It's forbidden to do actions that interrupt its sanctity—even silently switching Tefillin. The same applies to Kaddish or Kedusha —no switching should take place during these portions. Best practice: Wait until Shaharit is completely over, and only then switch Tefillin. Why Wear Rabenu Tam at All—And What Did Hacham Ovadia Say? While some authorities argue that one should only wear Rashi's Tefillin, Hacham Ovadia Yosef ruled that it is a beautiful minhag to also wear Rabenu Tam, especially for those who: Come from families with this tradition Follow the customs of the Arizal Have extra time after prayers That said, it should not be rushed or done publicly if it will cause embarrassment to others or look like showing off. The Ben Ish Hai emphasizes that if done privately and with humility , the reward is immense. How Long Should Rabenu Tam Be Worn? At minimum: Say Shema with Kavana Learn a few lines of Halacha or Torah Even reading one perek (chapter) of Tehillim fulfills the enhancement Torah learning while wearing Rabenu Tam Tefillin is essential— don't just wear them and remove them immediately . The learning gives them spiritual function and purpose. Summary: Rabenu Tam Tefillin should be worn after completing all of Shaharit . Do not switch Tefillin during the Hazara, Kaddish, or Kedusha. If worn, say Shema and learn a bit of Torah before removing them. The practice is commendable when done with humility and intention.