The Boys season 5 calendar theory may have spoiled when the show's biggest deaths will take place

Despite being on spoiler lockdown, it appears The Boys has been telling us when season 5's biggest deaths will take place – and it's all thanks to a calendar.

Spoilers for The Boys season 5 follow.

The Boys' official accounts, as you can see if you scroll down, have posted a bloodied calendar outlining the release dates of each final season episode.

But some dates, as soon becomes apparent, are more blood-splattered than others. That's sparked a fan theory that suggests the bloodier the date, the more likely a significant death will take place.

That's already been backed up by A-Train shuffling off this mortal coil in the first episode on April 8, with April 15's second episode seeing all major players remain intact – with Homelander even pulling his punches on Ryan.

Which means that the dates we – ironically – have to mark in our calendar is The Boys season 5's fifth episode on April 29, the penultimate episode on May 13, and (inevitably) the finale on May 20.

Intriguingly, Butcher actor Karl Urban has been vocal about the seventh episode being the moment where main characters are killed off – so the evidence is stacking up in the calendar theory's favor.

"Watch out, there's some big hits coming along the way, particularly episodes seven and eight," Urban told 7Bravo Australia. "There's major characters that don't even make it to the end credits of seven, let alone before we even get into eight. Watch out. Just get ready."

The only curiosity remains a half-bloodied date for the next episode, which has launched a second theory: Gen V's Marie Moreau will arrive on the scene and ultimately revive someone killed in that episode.

For more, check out The Boys season 5, episode 3 recap and a look ahead to The Boys season 5 release schedule.