Spoiler alert: No.
Ok, next time someone says atheism is a religion, here’s a good response from Susan Jacoby (Strange Gods, 2017):
“As an adult, I came to regard ‘losing’ my faith as an experience that had much in common with the end of a bad love affair: first came a certain sense of regret for the loss of a familiar presence, then relief at liberation from a relationship that had required me to behave in a fashion at odds with my deepest instincts about what constitutes a good and honorable life. Sincere religious faith is both a relationship and a love affair. That is one of the many reasons atheism is not a religion.
Another reason is the undeniable intellectual relationship between atheism and science. The most specious and most frequently cited argument against atheism is that it is ‘just another religion,’ because science is its divinity. The argument is rooted in a basic misunderstanding of the scientific method … .
Nor is atheism a religion on an institutional or communal level … [which is] one of its greatest disadvantages in what Americans call the religious marketplace.”