Seeing lots of Beta 1s and Beta 2s for .x updates that are 2 weeks
Next week makes even more sense than tomorrow then, if it's supposed to launch in April.
Since fanon patterns in previous releases matter this much, then:
Beta 1: February 4
Beta 2: February 18 (Vast majority of b1s are 2 weeks or longer)
Beta 3: February 25
Beta 4: March 4
If they're not doing any more betas then that would mean a launch of March 11, which isn't entirely unreasonable, but considering this update is adding the
biggest and
most complex and involved Apple Intelligence features, including Intelligence controlling 3rd party apps, I think it's safe to say 4 betas with a release the first week of March is not happening. It's much more likely they have this beta spaced out more, considering how massive the AI features being added are, or we get more than 4 betas which push us closer to an April release.
Either way, tomorrow is the least logical option unless 18.4 is supposed to launch in February.