On the 6th Week after Pentecost, the day of remembrance of the holy glorious and all-laudable First-born Apostles Peter and Paul, on July 12, 2026, a conciliar episcopal divine service was held in the Peter and Paul Cathedral in Kazan.
The Divine Liturgy was celebrated by Metropolitan John of Yoshkar-Ola and Mari, Metropolitan Kirill of Kazan and Tatarstan, Bishop Methodius of Almetyevsk and Bugulma, and Bishop Methodius of Kamensk and Kamyshlov.
At the peaceful and special litanies, prayers were offered for the Russian army and for peace.  At the funeral litany, petitions were offered for the repose of the sovereign Emperor Peter Alekseevich Romanov (Peter I), the church builder Ivan Afanasyevich Mikhlyaev and his wife Evdokia Ivanovna.
Metropolitan Kirill addressed the faithful with a speech:

Dear Hierarchs, honorable fathers, dear brothers and sisters!
I cordially congratulate all of you on the day of remembrance of the holy glorious and all—laudable First Apostles Peter and Paul, on the day of remembrance of our great contemporary, St. Paisius of Svyatogorsk, as well as on the 300th anniversary of this magnificent cathedral! The Lord has decreed that we should pray here today, partake of the Holy Mysteries of Christ, and congratulate each other on a bright celebration.…
...Today, on the occasion of the 300th anniversary of the Peter and Paul Cathedral, completely different people gathered here. There are those among us who once began to pray for this temple to come back to life; who later began to serve here; who worked and continue to work on the restoration of the shrine. And as we pray together here today, we realize how important it is to support each other. We thank God that a wide variety of people, driven by love for the Almighty Creator, love for their Homeland and hometown, bring this temple back to life.

Metropolitan Kirill welcomed the archpastors who had arrived in Kazan to participate in the celebrations marking the 300th anniversary of the Peter and Paul Cathedral.

Then the archpastor presented diocesan awards to the clergy and laity who had worked for the benefit of the Peter and Paul Parish. 
the report. There was also a charity fair of handmade products in the courtyard of the temple in support of children with disabilities.
On the evening of July 12, a festive concert was held on the territory of the Peter and Paul Cathedral. The musical program was presented by the orchestra of the Kazan Higher Tank Command Red Banner College under the direction of Lieutenant Colonel Yan Orekhov, the bishop's men's choir under the direction of Denis Rogov, as well as Honored Artists of the Republic of Tatarstan.