when did csm part 2 start

CSM Part 2 (Chainsaw Man manga) started serialization on July 13, 2022 on Shueisha’s Shōnen Jump+ platform.

What “Part 2” refers to

• This is the second major arc of the Chainsaw Man manga, often called the “School Arc” or “Academy Saga,” following Denji as he goes to school and focuses on Asa Mitaka and the War Devil Yoru.

• It directly continues after the Public Safety Saga (Part 1), which ran from December 2018 to December 2020 in Weekly Shōnen Jump.

Quick timeline snapshot

• Part 1 end : December 14, 2020 (Weekly Shōnen Jump).

• Part 2 start : July 13, 2022 (Shōnen Jump+).

• Part 2 end : March 25, 2026 (also on Shōnen Jump+).

So, to directly answer your question: CSM Part 2 began on July 13, 2022.

Information gathered from public forums or data available on the internet and portrayed here.