How does one properly observe, celebrate and/or commemorate Barbenheimer?

Why are they coming out on the same day?
It's increasingly rare for two such high-profile movies to hit theaters on the same day.

Some think it might have to do with Nolan leaving Warner Bros. (after its controversial decision to release its 2021 movies in theaters and on its streaming service simultaneously) and make Oppenheimer with Universal instead.

Their theory is that Warner Bros. chose to release Barbie the same day out of spite. When asked about this by Insider at a recent press event, Nolan chuckled and refused to answer.

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Opposite blockbusters have been pitted against each other in the past, like 10 Things I Hate About You opening against The Matrix in 1999. And, in a much-discussed parallel, Nolan's The Dark Knight premiered on the same day as Mamma Mia in the summer of 2008.

Experts say releasing two different genres of movies on the same day can actually be good for business, especially if they appeal to distinct demographics.

And it certainly appears to be fueling ticket sales for both Barbie and Oppenheimer, whose target audiences may not be as segmented as some originally thought.

One Twitter user went viral back in April for suggesting that there would be little overlap. He was immediately inundated with tweets — many from women in STEM — proving otherwise.

"Barbenheimer" took the country by storm this weekend. The phenomenon had movie-goers celebrating the release of two very different movies — the pink drenched "Barbie" movie and and the WWII period piece "Oppenheimer" — in the same weekend. "Barbie" ended up coming out on top, raking in $155 million at the box office, according to Box Office Mojo.

Oppenheimer, which is about physicist J. Robert Oppenheimer, who led U.S. efforts to create the atomic bomb, raked in $80.5 million to place second for the weekend of July 21-23. "Barbie" made nearly half its earnings on Friday alone, with $70.8 million that day.

Barbie will surpass $1 billion worldwide, according to Warner Bros. estimates. Hard as it may be to believe, that makes director Greta Gerwig the only woman in the billion-dollar club with sole credit for directing a film.

A couple of other women have shared credit for directing movies that made more than a billion dollars. Both Frozen and Frozen II were co-directed by a man and a woman, Jennifer Lee and Chris Buck. And Anna Boden co-directed Captain Marvel with Ryan Fleck. Wonder Woman, directed by Patty Jenkins, is among the top 60 highest grossing films, not adjusted for inflation, but it has not broken the billion dollar barrier.

“Barbie” director and co-writer Greta Gerwig will also likely receive bonuses because of the film’s outsized success. “Barbie” has earned an astonishing $526.3 million at the domestic box office since it opened a month ago, as well as $657.6 million at the international box office. That comes out to $1.18 billion globally — and that figure should keep climbing given that “Barbie” is still topping box office charts. The film is now the second highest-grossing release in the history of Warner Bros., behind “Harry Potter and the Deathly Hallows – Part 2.” It’s also the highest-grossing film ever from a female director, overtaking the previous record holder, “Frozen II,” which was co-directed by Jennifer Lee.