(IF you're involved with the film industry, feel free to correct any misinterpretations that I've made)
TLDR, I summarize which months are good for releasing and suggest strategies for this Quest regarding release dates.
If 3 films and aiming to capture blockbuster status – 1 in late Apr/early May, 1 in late June/early July, and 1 in Nov-Dec.
If 4 films with intent to capture Blockbuster status – ^same as above, but add 1 in late Oct/early Nov,
or 1 in June.
Alternative strategy, put the 4th one in 'dump months' – 1 in either Feb or August, plus (1 in late Apr/early May, 1 in late June/early July, and 1 in Nov-Dec)
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With regard to box offices and movie release dates in the US (presumably this applies for the rest of the Anglo world and the West to some extent):
Conventional wisdom says that blockbuster hits get released during the Summer (May-July) and in Nov-Dec.
'Bad' months for movie releases are referred to as
dump months, which are Jan-Feb and Aug-Sept respectively.
March, April and October are considered decent but not particularly excellent, although Oct is probably good for horror films(?).
Assuming we're targeting 3 releases annually (like the MCU in most years OTL), we could release a film in late April/early May, another near the later half of July, and one more during November-December. That would be hitting all the blockbuster beats*.
If we're gonna aim for a 4th release, then one option is adding another release in Nov-Dec (one in late Oct/early Nov, one in Dec). Another option would be a February/March release – so Feb/Mar + the 3 'standard release dates' (see *)
It's also important to note that the conventional wisdom on dump months can be flipped on its head – Black Panther, for instance, had basically zero competition when it was released in February (it also coincided with black history month, so it's not
just the MCU factor). The MCU actually has a history of winning big in dump months –
Guardians for example released in an August, and
Shang-chi in a September.
If we can establish a reputation for good MCU consistency, then releasing dump months become an advantage, since we'll be able to hoover up the box offices during those periods – all the competition will just be assumed by the general public to be dog shit or meh in quality.
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The second Box Office consideration is China – pre-2021, the Marvel movies seem to have been capable of getting approved of screening. The only months in China that were informally banned for foreign films were Jan-Feb (Spring festival, which is when a lot of domestic hits get released) – so if we're gonna pursue a February release date, make it late February, so we can line it up for China in March.
**While we're on the topic of China, I'd also like to note that we should under no circumstances play the pandering game. Chinese audiences watch foreign films because they're foreign – if they wanted to see something Chinese, their domestic industry already provides that. Chinese influences are a-okay, but pandering will bite us in the ass (see how live-action Mulan got thrashed by Chinese audiences, despite all the pandering Disney tried to fit in).
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Specific to release days, Fridays are the most popular days for releasing films (because people generally have weekends off).
Thursday release is also an interesting idea, if we think a movie will knock it out of the park – early viewers will spread the hype since our competition will presumably release on Fridays (if applicable and we share the same release weekend).